If you plan on wreck fishing get used to this situation. The best you can do is try getting to your piece as early as possible and still that won't prevent someone else from mugging you. Like it or not you don't own the wreck and while common courtesy should factor into other boater's decisions when someone else is already on a piece it rarely does. As others have already pointed out, the further offshore you go the worse it gets because there's less options. There's not a fishery this doesn't happen with. Try trolling 100 square when there's a hot big eye bite, it's like a demolition derby. No different with fluke or any fish when they're concentrated in tight areas, other boaters will mug you in a blink. Wrecks are worse simply because there's no such thing as "close enough", you're either on the piece and catching or off the piece and just soaking your bait.

Unfortunately there's more than a few who just don't give a crap and truthfully shouldn't operate a boat. BUT they do. I remember years ago being on an offshore giant sea bass trip on one of the big party boats where you leave at 11:00 the night before. So I have to think we were probably 50 - 60 miles off shore. We're on a piece and about an hour later here comes a private boat who drops his anchor no more than 30 feet off our stern. Thought the Captain was going to have a hemorrhage! Captain of the private boat could care less, he didn't move until we did. Again if the wreck can accommodate two or three boats go for it but creating an unsafe situation or restricting fishing for the boat who was there first is never right. I can only imagine at that time of year in waters that cold if the party boat anchor slipped and drifter back into the private boat getting their screws caught in his anchor line it would have been a completely different situation altogether. The world we live in, same people who show no common sense or consideration on the roads unfortunately own boats too!