Wow, apparently common sense isn't a pre-requisite for being an animal rights activist.
4 years ago, fishing steelhead in Sheboygan, WI my brother and I had a run in with two of them. The Sheboygan River is an easy target because it is right off the highway and FULL of fish, both spring and fall, and these jackasses were kayaking through all of the holes dropping rocks they were picking up from the river and yelling "Swim away fish, these men can't hurt you when we are here." Well, I'm 6'10" so the depth of water wasn't a concern to me. I waded over, grabbed a kayak, and proceeded to push it under water until the little jerk started screaming like a piglet. Then, we called the DNR and they came right away and gave them disturbing the peace tickets. It was great!