There were many parody accounts on the social networking site.

Users began abusing the program this week after the revised subscription service gave users a coveted verification check mark. The fake accounts sent spoof messages about the superiority of Coca-Cola and free diabetes care. A fake account bragged about using child labor and pretended to be a company owned by Mr. Musk.

By Thursday night, Mr. Musk seemed to have lost his mind.

In an internal message seen by The New York Times, an engineering manager wrote that they needed to quickly make official labels for big advertisers. The request is from one of the companies.

The so-called global town square with more than 200 million users has descended into a messy swirl of accounts pretending to be high-profile brands. Some users are exploiting the changes made by Mr. Musk to make chaos happen.

There could be serious consequences for the prank. If fraudsters created confusion and amplified lies, the quality of information could suffer, according to a director at the Atlantic Council's Digital forensics lab. People might make a buck by spreading false information on their accounts.

The senator from Massachusetts wrote a letter to Mr. Musk after a Washington Post reporter posed as a politician on social media to show how easy it was. How this happened and how it will prevent it from happening again need to be explained byTwitter.

The service that people pay for to get a check mark seemed to be paused. The check mark has been used as a symbol of authenticity for a long time. After the account holder was verified, it was free.

The status of Twitter Blue was not commented on by Mr. Musk or the social network. The billionaire appeared unrepentant about his actions on the platform. He said that the social networking site hit all-time highs of active users.

The disarray was caused by Mr. Musk's ownership of the social networking site. Since completing his takeover, Mr. Musk has laid off about half of the employees at the company and warned brands that he would use a "thermonuclear name and shame" if they stopped advertising at the company. He said that employees need to be more hardcore.

One of Mr. Musk's solutions is to push for more revenue by charging $8 a month for the service. Users are charged $5 a month for the ability to modify the home screen of the app.

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There was a quick change. Since completing his $44 billion acquisition of the social media company in October, Musk has moved quickly to change it. Some of the changes have been looked at.

The person is going private. The delisting of the company's stock is part of Mr. Musk's acquisition of the company. Not having to make quarterly financial disclosures is one of the benefits of being a private company. Private companies are not subject to the same scrutiny as public ones.

There are layoffs. About 3,700 jobs were eliminated after Mr. Musk closed the deal. The engineering and machine learning units, the teams that manage content moderation, and the sales and advertising departments were among the divisions that were laid off.

It is possible to moderate content. After closing the deal to buy the company, Mr. Musk said that a content moderation council would be formed. Advertisers have stopped spending on the platform because of the fear that Mr. Musk will loosen the rules.

There could be other changes. As Mr. Musk and his advisers look for ways to make more money at the company, they are said to have considered adding paid direct messages, which would allow users to send private messages to high-profile users. The company has filed paperwork to make it easier to process payments.

The new product, which is only available in the United States, Canada, Australia and New Zealand, did not include check marks. The company paused the debut of the check marks until after the election because of the spread of misinformation.

Mr Musk was aware of the dangers of being impersonated.

He said on Sunday that anyone who impersonates without specifying "parody" will be permanently suspended. She was suspended from the social networking site.

According to Media Matters for America, parody accounts, conspiracy theorists, and white nationalists got their check marks on Wednesday. Some accounts went crazy.

Eli Lilly was fooled by a fake account with a check mark and said on Thursday that it would give away freeinsulin to its customers. Eli Lilly's stock fell more than 5 percent in the morning and was down more than 4% at the end of the day.

An account with a check mark pretended to be Nintendo of America and sent a message with a picture of Mario making a gesture.

The fake statements were quickly denounced by the targets of the prank. The company was working to correct the situation, according to a spokeswoman. A spokesman for Nintendo didn't say anything immediately.

The accounts that were created on or after Wednesday would not be able to subscribe to the blue service. Users were temporarily blocked from changing their display names on Wednesday. Users who changed their names to make jokes were not able to do so again.

Doja Cat asked Mr. Musk for help in changing her display name to Christmas because she didn't want it to stay Christmas forever.

Doja Cat changed her name to "Elon Musk" after Mr. Musk said she could. Her display name was simply "fart."

The representative for Doja Cat didn't reply to questions.

There is a new context for the check mark, according to Richard Rabbat, vice president of product management at the company. He asked why it is hard to comprehend.

The confusion had become too much for the social networking site. The company said it would put an official label on some accounts. The company said it wouldn't add such a label.

As of Thursday, more than 140,000 accounts had signed up for the new service.

Mr. Musk wrote that comedy is now legal on the micro-blogging site. Many brands did not find the prank funny.

The future of this platform is pretty bleak from a misinformation standpoint.

The theater publication Playbill said on Friday that it would stop posting on its social media accounts. The company said it would focus on its social media efforts.

Playbill's chief executive and its chief operating officer said in a statement that there has been an increase in tolerance for hate and misinformation on the social media site. As a respected news outlet for the Broadway community, we feel we can no longer use a platform where the line between news and rhetoric has become blurred.

Some people used the moment to engage with their followers. The Washington State Department of Natural Resources made a joke about the wildfire on its account.

Rachel Terlep, the social media manager who runs the account, said the account had generated more than 1,000 new followers for a related account.

The former editor of Vanity Fair, Graydon Carter, who skewered New York celebrities like Donald J. Trump as the editor of Spy Magazine in the 1980s, drew a distinction between satire on the internet and the wave of impostors hiding behind social media.

Mr Carter believes in identification on the internet. You need a license to own a dog in NY.

Michael Paulson was a contributor.