[sweetjazz]

If any player only raises PF once or twice in 50 hands, I consider him to have tight PF raising standards. The fact that he gets out of line postflop seems irrelevant to this. Obviously, the villain likes to call a lot of flops and then grossly overbet his hand from that point on. Why would I respect his PF raise any less because of that?

I agree that his play is very odd, as most maniacs also love to raise way too much preflop. But if someone with a PFR of 2% or 4% after 50 hands raises PF, he probably has a real hand.

If the OP meant by he doesn't raise too much after 50 hands that he has only raised 8 times (16%), then that's a different story. Then I think you have to cap preflop and cross your fingers.