Interesting first post problem. I didn't bother to read the other answers so here's my thoughts. First off it depends on the state you live in & the person you are. By that I mean that in some state you have no rights & nothing you can do "normally". Then we get to the person you are. Me, I'm old & I don't generally give a damn. I'd open up with Hi, I sorry to tell you that you're trespassing on my property. What they said in replay would affect my reply. A reply of "Sorry but I'll leave" would get a replay of "No problem, have a good day". A reply of "get lost" would get a reply something like "Oh wow, my land must be even better than I realized if your willing to die to see it, by the way are you armed?". And here's the kicker that they should realize, again I'm old & I'm going to die fairly soon, no matter what. So does it matter if I die from a heart attack, smoking, old age or in an electric chair? If they don't care, neither do I.