I may cost a little bit but there are untrasonic solar powered stakes that could be put down to scare them away from public trails during spring-fall. Just a thought. It shouldn't be mandatory on private property by passing oppressive bills and creating more burden for property owners but it is a good idea if you want your yard to be snake free. Alot of people like snakes and simply learn to live with them so it's not fair to force people to comply.