I will always attempt a steal if folded around to me in the cut off or the button(5NL and 10NL mind you) with a 4bb or 5bb raise. I never give the blinds a free pass. If they re-raise I fold like a cheap tent. If they call I wait to see what happens post flop.And If some player tries that on me from the same positions more than once then I call his raise/c-bet big enough to keep them honest. He'll either have a hand and play into me or fold. You'll find out if it's a steal or not. Either way he'll think about the fact that you'll play aggro from the blinds and he better have a real hand.