I can't help but give people pointers when I know what's going on at a particular lake. The other day when I was doing well, I actually gave a guy one of plastics without him even asking. Then I shared the little opening in the reeds with him so that he could pitch into the same area I was fishing. More often than not, the people that you share the info with won't be much of a threat anyways. Because usually it's all in a flick of the wrist or exactly how you're moving your bait. More than anything the new guys will take up space or might be in your favorite spot for a while. I just wait until they move and then I catch the fish they've been hitting in the head with they're lure for an hour. Although I do get frustrated with crowds.