I hate seeing a constant stream of minraises from a plr. The reason is that it gives little information but serves to build the pot and draw in alot of marginal hands. This makes it more difficult for a strong hand to isolate. In this situation, I'm forced to tighten up my PF play since there are probably more marginal hands in that could upset me. I won't bother limping with QT or KT for instance if I have to face a minraise with 4 opps.

I can see how minraises may draw in loose plrs and push out tight plrs so from that point of view it may be a beneficial play if you have a drawing hand like pkt pairs or JTs. I can't see much other benefit.

I will sometimes use minraises to help get reads on plrs. I find that plrs who fold to minraises are tight and those that call are loose.