My antennae perk up when I see talk of banning anyone from a platform. If you don't want to follow the path of every other Web2 walled garden, you could have a black-list function. A user can create a black-list and others could include it in their rooms. If has a good blacklist then most users would adopt it - it can even be a default or a recommended "opt-in".
RE: Snapie Radio is almost here!