What works well for me is a sign of a bull that says "I can make it to the fence in 3.2 sec! Can you?" And I have a black steer roaming the property. That seems to scare more people than gun signs. I also let a caretaker live on the property for free. If you can find someone trustworthy, that works the best. We started a bunch of rumors about him killing trespassers and people believe it. We say "He carries a no trespassing sign around with him so when he shoots someone he can put the sign on the fence for the law!"
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill
