Elon Musk plans to reinstate nearly all previously banned Twitter accounts — to the alarm of activists and online trust and safety experts.

After posting a Twitter poll asking, “Should Twitter offer a general amnesty to suspended accounts, provided that they have not broken the law or engaged in egregious spam?” in which 72.4 percent of the respondents voted yes, Musk declared, “Amnesty begins next week.”

The Twitter CEO did not respond Thursday to a request for comment from The Washington Post. The poll garnered more than 3 million votes

The mass return of users who had been banned for such offenses as violent threats, harassment and misinformation will have a significant impact on the platform, experts said. And many questioned how such a resurrection would be handled, given that it’s unclear what Musk means by “egregious spam” and the difficulty of separating out users who have “broken the law,” which vary widely by jurisdiction and country.

“Apple and Google need to seriously start exploring booting Twitter off the app store,” said Alejandra Caraballo, clinical instructor at Harvard Law’s cyberlaw clinic. “What Musk is doing is existentially dangerous for various marginalized communities. It’s like opening the gates of hell in terms of the havoc it will cause. People who engaged in direct targeted harassment can come back and engage in doxing, targeted harassment, vicious bullying, calls for violence, celebration of violence. I can’t even begin to state how dangerous this will be.”