Whenever I get minraised, I generally lean towards calling rather than 3-betting or folding no matter what I have. The nature of a minraise is that its so weak that whether he's got a good hand or not its worth it to at least call, because the pot odds you are getting are irresistable.

Then only time i 3-bet a minraise is

1. When I am sure I have the winning hand AND that he will call with a lesser hand.

2. If i have a read that with this player minraises mean weakness AND I am sure he will fold to my bet.

Other than that I don't see a point in it. I think its really bad to 3-bet "by default" against unknowns who minraise you, because its a losing proposition to believe that everyone will fold to a reraise.