I have no problem with othesr invading my hunting spot if it is on Public land or they have permission. Just because I want to hunt there doesn't mean they can't. We all have rights to the land. Ethically I would never do it and always avoid others. If I find others nearby I get out anyway. Deer shut down really quickly from pressure and you can't know how much pressure the others are applying and on your day you might be totally wasting your time.
Trash on the other hand is a real problem. 30 years of going afield and the most I have left is TP and maybe some paper towels after cleaning up after a gutting a deer. Paper towels hidden away do deteriorate in a couple days and no one will ever see them in the mean time.
Scumbags in the woods make me sick.