When to call min-raises from the blinds?

[Wish]

I play in low buy in tournaments, and the play is pretty bad. (I'm not that good yet either, so that's OK with me.) My question is about a situation that comes up a lot in these sorts of events.

I'm in the big blind. Somebody around the HJ or CO seat minraises, and either one or two folks call before it gets to me. Assuming unknown villains, can somebody help me out with proper calling ranges for different situations?

My instinct is that deep-stacked (usually early in a tourney), I should treat this like any other poker game can call any two if the pot is laying me 7:1 odds. I'm not as sure about the one-caller 5:1 or no caller 3.5:1 situations. I'm also not at all clear as to whether that decision changes as the stacks get shorter (say I've got M~7 or M~15).

I'm looking for advice on when/if I should be calling with relative trash here. If I've got a premium hand, I'll be reraising.