Every champion is capable of picking up a quadra/penta kill given the proper situation. I would frankly rather play against those champions as at least I know the player behind the champion is going to be exceedingly overconfident.
It might be because I'm in bronze, but I've never found those champions to be all too threatening. I'll simply take Cho'gath into the lane, or a champion of equally frustrating capabilities as they won't all be banned/picked out.
I play mid lane almost exclusively, so it's also possible that I'm just very comfortable against those champions.