for the record, it was just meant to be a touch funny.
as for the flair badge, your site appears to already use them with vip/premium members. just add it with banned. put a red exclamation, or a skull/bones logo.
Or then use CSS to put a red X or the word banned in an that displays in place of a profile pic as an overlay over their profile pic for anyone with primary group set to banned.
Or use CSS to add a “text badge” next to their username.
checkout community.webcore.co
we have some custom CSS that displays next to a user’s name (admins, or users in verification stages of account display vatious title/badge with colored backgrounds). click around, you’ll find them randomly. should give you a starting point.
it’s all “primary group” dependent.