Here we realy haven't had a problem. jmo

But I do believe there is a right and wrong way to aproach tresspassers. First post your land well.
Next if you find someone on your propertyaproach them and let them know they are on your propert and it is posted. I think some people aproach this the wrong way and a situation could end realy ugly. Plus some people may miss the signs. Now repeat offenders etc. They get a little stronger warning. Like calling the law. JMO