I'm managing hunting on 200 acres of conservation area in our property association, and the amount of baloney trespassing hunters pull never ceases to amaze me. Completely opposite of the way I was raised to respect landowners. They set a bad example for hunting and firearms use.
The land was designated a conservation area by the state so we can have a wildlife management program and get a tax break, but it carries some rules, like no hunting with packs of dogs, no vehicles off-road, hunting only on weekdays, etc. I think I spend more time chasing off trespassing hunters on weekends than everything else put together. The common issue is some dipstick who's dogs track/chase a deer across lines into our land, and then they see that as justification to follow the dogs with their trucks and shoot whatever deer they want. I've been telling the guys that if it's not legal for us landowners to hunt on weekends with dogs and trucks, it's sure as heck not legal for a trespasser. The only good thing is that the land status gives us a more direct oversight from the game warden, so they come down hard on violations. I've been taking photos and giving out warnings, telling people next time the game warden gets called.
The other problem is that we broke the area down into 6 zones, first-come first-serve to approved hunters each day, and hunters coordinate with each other. They get a chunk of acreage to themselves and everyone is spread out, so hunting is better and safety is improved. That concept goes out the door when a dumb trespasser just goes wherever they want and lets their dogs roam the area.
Va. has new laws about trespassing dogs. It is now a crime for a hunter to let a dog trespass. He still can retrieve a dog, but cannot carry a weapon onto your property. I don't know how well the law is enforced, but at least we have another weapon. I haven't had to run off coon hunters since the law was passed.