Nobody should be banned, ever. Racist slurs aside, of course. Anybody who riles you up, should just be ignored (not put on ignore) just ignored, full stop.
The only ones who I can think of who are really bad are: Fat Dave - Did u not say u shat on your wifes arm one time? Poor stuff.
Grimbo : Pretty poor posting content, fair do's with the whole public funding malarkey though , well played, make the most of it (very sad that your pets were involved, I would be devastated) but jeezo, sort it out. . .
The jambo who moved to Poland, got married and bumped - You also need to sort it out. Kurwa maç, Ja Pierdole !
I can't really think of anyone else who's that's brutal, perhaps, maybe the Dundee fan with the stick legs who reckons he's a 'top boy' but that's about it.