However many games you have to play to access rated games and forums and clubs, the same reoccurring trolls and cheaters will happily blitz through a few 1-minute bullet games to be able to come back.
A better solution would be to only allow one account per device. That way, if someone were banned for whatever reason, they'd have to create a support ticket in hopes of coming back. But there are still VPNs...
Basixally, there's nothing much chess.com can do, unfortunately. All you can do is report these users and hope that the staff is competent and bans or mutes the users accordingly.
I am talking social wise and game wise. New Accounts should not be able to play straight of the bat. They should have at least 10-20 games played to even get paired with actual people. Also they should have at least 30-50 games played before they can access the social side. It's been a year to 2 years since ive been on this site and nothing has been changed regardng this issue. And one more thing, they should have at least 100 games played to access arena tournaments because a lot of people have complained about that. And if you are wondering the Verification thing chess.com has (where you have to verify using your email) does nothing to stop trolls and spammers.
Also criticism is allowed here. I love different opinions!