i get the same problem in the perch pack. i never go near it cause quite frankly i like the solitude of being out in the lake. but then the pack starts building around you. i really want to be the bigger man and shut it, but the ignorant behaviour was theirs, not mine.
i like to think there is an imaginary radius around you equivalent to your anchor line. its yours.
its difficult because i dont own the lake, but its a really big lake, i dont see why boats need to get jammed up in the middle of lake erie.
just an idea, stand up on the casting deck, drop your pants and take a 5 minute, 2 large coffees, 8 beers the night before piss(sorry if i can't say that) facing them.
if they came out on the lake for some privacy they will likely take that moment to find it...