When someone bets an absurd amount preflop I just fold and hope anyone else without aa or kk does the same. i honestly don't care what he has. if he does it consistently he'll be destacked quickly.

on teh 2nd question. it depends on what i have. I'll give a big bettor respect unless i was trapping him anyway. I'll do the same though - slow roll a nut hand and then make a rediculous bet. If the pot is small I'll bet a ton with the nuts on the river hoping someone looks me up.