id say it depends on how deep of a stack you have. when i'm playing against players with at least 100 times the bb i will call lots of preflop raises and even reraise with marginal holdings. usually not something like k 10 or A6 though. i'm more likely to do it with 45 78 or something like that. if you have a read on him as a very good laggy opponent you can't eliminate these hands.