The innocent dog owner isnt an issue in my opinion, its the campers that have destroyed the trust of land owners i know of two locations that have blocked all parking because of aresholes getting away with goalie and putting themselves in danger, Gladhouse reservoir used to be a lovely spot for a fish and a picnic, police are never away from it now over the weekends in summer months.
The Meldons was another area that when kids everyone had a picnic play in the burn and left the place as they found it, nowadays it wasn't uncommon for people to bring marquees, generators, dj equipment and speakers, people absolutely away with it leaving a trail of destruction.
On the stalking front I regularly meet dog walkers and either just move off without them knowing or say good morning, there was a couple locally that had a unsociable dog and they avoided everyone by walking at the crack of dawn in all the bits they wouldn't meet anyone, yes the bits that were most productive for deer, smile and wave