Bring along an animal control buddy

And better yet take that hamburger(before the doctoring) and have a nice little shore lunch.

As far as the Dude!! If he is not personally bothering you or casting over you, who cares what his attitude is.

You could just bring a group of buddies or just one off balanced friend to help deal with the problem, or don't fish there.

There is alot of water to fish!!

That sucks though there is always someone around like that!!