@ghost Thinking about it, I feel I owe a reason for saying 'no' instead of just saying it.
I don't like it because sometimes things go bad on games, or people make stupid mistakes, or people have that bad day/month/year, etc; it makes folks look lousy, and winding up on that kind of list starts outing people who can use a new game to start clean and learn from their fuckups, and/or evade toxic staff elsewhere, or vindictive cliques (which have come up quite a few times over the last few days).
Full disclosure, and probably TMI, I've had some bad run-ins on games. Granted this is over about 24 years of MU*ing, but how long would that kind of thing stick on that kind of document?
I was blacklisted from a set of games back in the 90s, in the SYE era, by a particular clique that brought up game after game over several years, and if they weren't running them, they were staffing on them. My great sin was that I was playing an opposite-sex character, and a staffer who'd crushed hard on that character was told by my jealous RLSO (at the time) that the player was of a different sex. I'd never pretended OOC to be anything other than who I was and I did not lead them on (I was already in a relationship and was trying to make that work!) but they, a virulent homophobe, decided that I had tried to 'trap' them because our PCs had expressed interest in each other (though they had not TSed).
After I left my SO (and that game), they, their friends, and this person especially, tracked my IP and kept a list of known sightings and updated IPs, and either got me banned, or hunted my PCs with their alts while using their staffbits to track me while I was unfindable-- even if we'd never interacted before. They were allowed to do this until I took a long break, and then on my return changed my writing style and the type of character I played. I was able to avoid them for years after that, but about ten years later, my ex found out who I was, and started right back up.
They, to this day, 20 years later, try to sabotage my IC and OOC relationships on games if they find out, which is why I rarely share RL details (and was part of why I did not share my cancer fundraiser with the MU* community). I'm only comfortable admitting to all of this on this account because a) AFAIK most of them are not around anymore, don't run or staff anywhere, and b) I only play on my own game right now, so I can't be hunted by staffalts.
So my first reaction to a multi-game DB of 'problem players' elicits a visceral 'NO!' from me. Those folks got plenty of nice people to believe all sorts of nasty crap about me because I a) cross-played and b) left the wrong very controlling ex, who is very good at assembling their own little posse. When they thought someone ELSE was me, they poisoned just about every relationship that person ever had on that game, and when it became clear that person wasn't me, the damage was done.
So, I don't even remotely want to make things harder for unjustly ostracised OR genuinely repentant players to start with a clean slate. On my own game, we've had a few who, new to MU*ing, had a rough start, but we gave them more chances and they absolutely became better players. We've had folks from other games whom staff openly mocked as terrible, but they also became, after more experience, active, friendly, and helpful assets to the game.
We are pretty good at tracking the most toxic players here, and we know that they are consistently and genuinely toxic because of patterns of behavior that haven't changed over years (and years). Those are the players we need to look out for; most genuinely troublesome players are rarely that dedicated and either get better or get sick of backlash and leave.