Excellent points.
Wrong, you douchebag!
Dude?
Seriously, on the others, I agree they were characters who added something to the collective. Not that I particularly like having them around, but they were legitimate entities (not so sure about Spiked, though). But I think in all cases where types like that were banned, they were banned for clear reason. You or I may have missed the particular incident that broke the camel's back, but we have pretty lax moderation here. If you were banned, it isn't simply because you were disagreeable. And I believe many of those banned are back (or have come back at one time) under new handles.
Coli is one guy who's presence I miss, particularly on OTW.