Watch as how he calls a pot-sized bet with a set on the river WITHOUT raising you which a near-nut hand. You will lose way less against this player than a player who will RAISE you, because you have the potential of losing more money.

Every time I see someone JUST CALL or even CHECK with a set on the river I think "Thank God he didn't raise, because I would have SO called that"

I mean, jeez, pick up a hand and take him out. Watch as he calls an all-in bet on the flop with nine high and an inside straight draw... because "you might have been bluffing"