I ran into one of these guys a while back. It was in a freeroll, I was dealt K7 :h I had a nice size stack, and the blinds were still real small, so I limp in with that flop comes A :h , 9 :c , 4 :s , everyone checks around. Turn comes 3 :h , everyone once again checks around, and I'm liking all these free cards. River comes and its J :h . The other guy finally bets 700, I decide not to be too greedy and just double his bet to 1400, so he goes all-in for like 3500, and of course I call him. He shows A9, and starts crying that I shouldn't have been in the hand at all. I explained to him politiely explained to him that any bet after the flop or a decent sized bet after the turn and I woulda been outta there, and it was his own fault letting me have free cards. He then proceeds to tell me I know nothing about cards, as I just sit there watching the rest of the table tell him he has no clue what's going on.