What are you going to do, having someones account though, possibly if they are well known attempt to changes peoples perceptions of them/ get people to believe

What are you going to do, having someones account though, possibly if they are well known attempt to changes peoples perceptions of them/ get people to believe something? You can't delete comments older than like a day so trashing the account is mostly out. Once they noticed they could invalidate that session, mention it wasn't them and it would be the end of it. I feel mostly the same way about Facebook, those so inclined could do more damage un-friending everyone, at which point I could thank them for cleaning out old contents and organically readd those who I still speak to.