Our late, banned Serbian kid used those two words incessantly in one-word posts that often had nothing to do with what was being discussed. It got to be irritating after the first 50 times or so.
Eventually he got banned for posting 'F*** You' to an Admin. Then he snuck back in 3 other times, and was kicked out again. If he tries to come back again, and we find out, we'll ban him again as many times as it takes.
Bottom line is, we are on high alert around here. If you act like Repo, you're a suspect.