We have an exile feature with groups (So we can boot out group members), but I think we should have the ability to ban people from joining/posting to a group if they were kicked out.
I ask for this because a group I help manage with a friend has encountered a lot of spam lately (Mostly hate speech/meme spam), and the users rejoin the group the moment they get exiled (Or create alt accounts if they're banned from Roblox).
I don't think that users take exiling seriously, and that the ability to prevent people from interacting/joining/requesting to join a group is the next step up.
For those who are repeat offenders (Who create multiple accounts to harass users on Roblox, even after getting banned numerous times), I think that a shadowban feature (Similar to what Reddit has) would be wonderful.
A shadowban is where someone can interact with a website (Posting on the forums, group walls, in-game chat etc.), but their interactions don't appear to other users (Example: User A posts to group wall, their message appears to them, but to everyone else, it's invisible).
The reason that I ask for a shadowban feature is because repeat offender users (Trolls, users with grudges, exploiters etc.), tend to create alternate accounts/harass other users more frequently when they realize that an administrator is intervening (They take pleasure in the factt that they're provoking a response from higher authorities).