typically ppl who minraise aren't doing it for the right reason, the correct reasons to minraise would be playing against a 3bet monkey or playing against a nit who folds too much PF but plays really poorly postflop when he calls.

most are minraising just to raise but play small ballish type poker, if you can constantly apply pressure on them with big bets and building bit pots you'll get them to make mistakes b/c they'll be in situations they're not used to being in.