Personally (not kicked from any compagn) sometimes I am about to explode when I see many users posting trash, a largely off-topic/spammy post in the same topic, especially if they are wearing sig.
Can't resist when a person try to convince me that he has a ''minus'' IQ!

What i consider spam for example : in the yobit sig topic, one guy post: the blue button isn't working (ok thx 4 the info) another one : oh it's not working for me 2 (for the... It will not work for you all!!  ) ... Another one :me too...etc,  just count the number of the useless posts there. After 1 to 4 days of spam it got fixed, 10 users confirm that it works again (if it works for 1 it will work for you all!)
Mind you, this happens weekly/biweekly!