Besides, you can't teach respect or decency; if someone is rude to other users, a guild or something similar is unlikely to correct them. I think creating all sorts of "shame boards" is a pointless exercise, and if it does have any effect on "uncultured" users, it will only be in the opposite direction. Only decisive measures can help, but that's a different question; it shouldn't be related to guilds. Otherwise, it seems like those in the guild are "good," and everyone else isn't?
In my opinion, it would be better if guilds weren't a topic, a kind of informal association, but rather something... what's the word... "generic."

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!