RE: Non-res landowners
Yep, that's our problem in too. Our family spends a lot of time improving land (food plots, etc.) in an effort to produce better quality and more deer. The problem is that others around the area poach and trespass over our land when we're not there.
I couldn't tell you how to correct this problem. One thing I've thought about doing is trying to grow thick brush and briars on the edges of our property where people would be most likely to trespass. I don't expect this would stop illegal activity completely, but it might discourage a few poachers and at least alert deer when people come trampling through.