So, you're tired of people snooping around on your property, and don't want to have to build walls to keep them out, well try land mines. The unsuspecting trespasser casually walks onto your land, sees nothing out of the ordinary, next thing they know there is a big explosion and they lose half their health, they just stumbled into a mine field. If you want to give fair warning to people there are signs you can make that will let them know there is a minefield, but what fun is that?