I think most dock shooters (crappie fisherman in general) at LOZ are pretty good people and will do their best to leave things as they found them. I have shot between pontoon floats and hung on the lift pump hose numerous times. I will not pull into and break that jig off, potentially puncturing the hose. I get out and retrieve the jig, and typically move on. If someone has a problem with that, they’ll just have to throw a fit, call the cops, throw rocks, whatever. Same with boat tarps, etc.
I don’t see Ameren doing much about people fishing privately owned docks, because frankly, what is left to fish on a big majority of the lake. However, there always seems to be a few that bitch and ruin things for the rest.
Roap, boards, chains, construction fence, I’ve seen it all... and I’ll tell you one thing from a guy that fishes LOZ religiously, all you’re doing is putting up a big neon sign that says, “CRAPPIE UNDER THIS DOCK - COME FISH HERE”. The best dock shooters on LOZ are going to find a way to get a jig in there. If there are good crappie under there, I will get my jig in the smallest crack in the encapsulated, fencing, whatever. It’s almost like a challenge to catch a fish on that dock at that point. For those that aren’t real good at shooting docks, you think you’ve got jigs hung on your dock now!
Honestly, it sounds like you’re just trying to get ideas to keep people from fishing your dock without sounding like a... But, I’m with Beagle, be respectful to the fishermen, and most fishermen will be respectful to the dock owners.