Just a 2nd thought. All I think we need is the front ends to have a setting where we cannot see blacklisted users.

Users should be able to choose who they want to blacklist.

This tool exists, but it's global. The frontends are able to prevent a blacklisted account from being displayed, but only across the entire userbase.

Marky has been all but begged by me for that ability to choose who to blacklist, but he (and others) say I can just create my own bank and be just like Moammar Gaddafi... er, I mean lrn 2 code and make my own blacklist that works the way I want. Pharesim once planned on making such blacklists available, but IIRC correctly he changed his mind and didn't do it.