Users of X, formerly known as Twitter, will no longer be able to block comments from unwanted followers, according to a post by X owner Elon Musk on Friday, eliminating what’s long been viewed as a key safety feature. Blocking will only be available for direct messages, he said.

“Block is going to be deleted as a ‘feature’, except for DMs,” Musk wrote Friday. He was responding to a post from the account of Tesla Owners Silicon Valley, asking, “Is there ever a reason to block vs mute someone?” The group behind that account promotes the electric car company, where Musk is CEO.

After acquiring Twitter last year for $44 billion, Musk has overhauled the company, laying off many employees, restoring previously banned accounts, and recently rebranding the company and platform as X. Neither a reason nor a timeline was provided for eliminating the block feature, only that “it makes no sense” and that the mute function will remain available.

The block function allows users to prevent hateful content and harassment from showing up in their feed in response to their posts. Muting only prevents the individual user from seeing unwanted responses, but does not prevent others from seeing them.

Blocking certain brands or promoters on Twitter has also been used in boycotts for years.

Changpeng Zhao, CEO of Binance and an investor in the new Twitter, said the company should shift its focus.

Zhao, whose company owns one of the world’s largest crypto exchanges, wrote, “X should really fix its bots and spam problems before removing blocks.” This is just my opinion.

Media and advertising executive Louis Jones, who now works for the Brand Safety Institute, said Musk’s latest plan could inundate users with spam, threats, and other harmful content.