I find threads like this on virtually all forums I frequent, generally when a persons banned its often for reasons outside of a single post or their conduct over a period of time, permabans that are requested being the obvious difference.
That being said I think a lot of you are wearing rose tinted glasses remembering only select threads and posts by a user and fixating rather than considering the full impact of a users presence.
Additionally, drama disruption and strong bias are all good reasons to keep a person gone, not reasons to bring them back.