Yeah , but people start to think that they can beat the next level even though they cant beat the one they are currently on because they think "I would be able to win if only they were smart enough to fold bottom pair/whatever when I bluff."
Bluffin at micro stakes poker! Now theres a novelty, more chance of AA standing up to 6 callers than a bluff being successful. As well as that, its not the bottom pair players that are the problem, 9 times out of 10 when you get rivered at micro poker, which happens a lot, its to someone who started 47 off or the like to capped pre flop betting and rivered a crazy straight, the other classic is the any suited any position players who start any 2 suited cards even to capped betting and river a flush. There is no shaking these players regardless of how many raises and re's go in!

Someone corret me if I'm wrong but surely this doesn't happen up the levels at higher stakes, or, if it does still happen, its not so widespread?