Nothing happens, because normally users have no responsibility in the eyes of the authorities for the projects.

I compare the attack that mixes suffered to the same attack that Torrent sites suffered 15-20 years ago. Probably no user of these sites was arrested, because the crime was not on the user's side, but on the side of whoever made the content available. In the mix it was the same thing, the problem was not on the user's side, but on the side of those who provide the platform with no form of "control".

It is unlikely that the forum and its users will be accused of complicity in the abuse that these platforms allegedly commit. But that doesn't mean that the forum couldn't suffer some headaches, just to have to explain what was really happening here.