Squatter rights on the extra 10'?
Plastic fence, how long before the sun cooks it into a brittle hazard when the next big wind storm hits?
You must have a State Authority who worries about drainage and flooding. The ponding on your side of the wall should raise their eyebrows. Maybe take bunch of pictures after the next big rain and send them to these guys and ask if this is normal or is a larger culvert required.
Public Health might also have something to say if you show them the pictures and express concern the mosquitoes might be carrying West Nile.
Build a second fence that follows your property line exactly. This would leave a "no man's zone" where all the snakes could be "stored". Anybody bitches, "it's not my land, so it's not my problem". Maybe a gator or two back there could spice things up a bit.
Follow the rules and milk the bylaws. If nothing else it's good entertainment. Stan knows the game and has been playing like a pro with FUHOA!!
Maybe you need giant wind turbine to help with the carbon footprint!
Maybe you need a patio hi-fi with a 50,000 watt 7 channel amp with "The House of the Rising Sun" at dawn and dusk. Or maybe add a big *** flag pole and run run the Stars and Stripes every morning to 50,000 watts of reveille, who could take issue with that?