I’m assuming these are the same type you’ve posted about over the past couple of weeks, that are being put in the right-of-way?
You can’t booby-trap them, because you have to think about children, animals and innocent people.
I know some people have suggested some foul-smelling sprays, which were rejected due to cost and lack of staying power. My personal recommendation is this: https://www.predatorpeestore.com/skunk-um.html I believe you mix with water so it’ll go a long way.
Other than that, there’s not a lot you can do: you have the right to put the signs in the right-of-way, other people have the right to remove them.
other people have the right to remove them.
Why?