This is just a thought that is passing through my mind.
When someone is banned, instead of seeing a ban page or being denied access, the banned user is silently and covertly redirected to his own personal version of the site.
It looks exactly the same, receives the same updates the real instance receives, and he will be able to see his own comments, but the banned user's comments do not propagate to the real instance of the site.
Perhaps also some sort of engine can supply fake comments only to this spawned instance which only the banned user sees, maybe even ones that stroke the banned user's ego with fake messages, like "LOL J00 JUST PWN3D DA MODZZZ GO B0Y!!!1!" and such.
Probably too resource intensive to actually implement, but what are your thoughts?
Updated by foxyfoxy1990