If you hunt deer long enough, it will happen to you. A trespasser or poacher will ruin your hunt.
Sometimes the reason for trespassing is as simple as looking for a wounded deer. Other times it's malicious with intent to illegally kill game or steal personal property. Knowing how to handle trespassers and poachers is extremely important.
Just the other night, it happened to me. I took off early from work and made my way to a tree stand I hadn't used this season.