[winky51]

Definitly raise preflop, no doubt about it. Do not fold.

If someone is weak enough just to limp then raise the bastard with any hands you raise normally with if you are 1st in. You are getting probably $10 for your $6 and the opponent is missing the flop 2/3 of the time.

Now as for the river. I think its much more likely this guy has a flush that a boat. KT or K8 are 18 possibilities and a flush hand (2 spades) is much much more. Remember he is also the big blind so his hand is random which adds to this. He might have a KQ and not realize there are 3 spades. I have done this myself (twice) and seen others do it. Only if I get 3 bet on the river am I just calling. You also have a guy calling between. He could have a flush or just trip Ks and is afraid of the flush.