I call too - just to see. Problem is not when you miss - that's an easy fold. It's when you hit. If you start hand with Q8 and hit top pair, you're either winning, behind to overpair or behind to top pair with higher kicker. If you are ahead, you'll bet to try and drive chasers away, but the pot odds
will be irresistable to anyone on a draw - the more in the hand, the better the pot odds and the less likely they are to fold. In these circumstances, how likely is it that you'll reach the river and still be ahead (unlikely - you'll be bemoaning getting rivered again!).
I read recently that if you worked out what seat position lost you most money, it would be the BB - I do agree that you can call a raise more cheaply than others to see if you flop a monster hand, but in reality how likely is that? Also, how likely is it that you would fold top pair if someone called after flop? If you say you would fold then, there was no point calling in first place! I think i'm going to start folding these in future, to see if results improve a bit.