I keep dogs etc so obviously wouldn't be giving permission to everyone. Chances are I'd just get to know about the knob heads visiting and you don't own wildlife.
there was a old fella used to go mental if he saw someone exercising/training a dog in one of his empty fields or if the kids were sledging etc. And another one that cut a conker tree down to stop the kids going in his field, sad men, wouldn't/won't be like that