I personally have no problem with crowd surfing. Surfing at a Watain concert? Well, that doesn't seem like a good idea... and crowd surfing to a black metal band doesn't really make sense anyway. But in general, it doesn't bother me. Yes, I've had plenty of people land on me, hit me in the head with their boots, and climb up my back to get on top of the crowd, but I see it all in fun. If you want to go crazy to one of your favorite bands, go right ahead. If you're up front for a show, you should realize that you're risking getting landed on. Just as if you're on the side of the pit, you should expect people to run into you at full speed. It's a show.