Never had problems in the national/state forests. Mostly we have seen hikers if anything. Up at Sam Rayburn there are sometimes people on the water that pull up the the beaches a little on the drunk side.
Closer to home is the park we ride in all the time. We aren't in the woods right now due to muddy conditions but unfortunately, Tyrrell Park is the hang out for men looking to hook up on the down low as they say.
Not deep in the trails - generally right off of the city road that loops through the park/golf course area. We have found intimate articles of clothing, ummm....a prophylactic hanging on a branch which nearly caused Kellie and I to have a cow.
and last year....porno torn out of a magazine (hard core very graphic) tacked to a tree and then other pages dropped on the trail Hansel and Gretel style out to the trail head. We reported that to the police. We see single men riding round and round...okie dokie.
Ran into a men on the trail but they were actually really hiking...and I am sitting on a 1200 lb horse that can haul hinny. I am always very cautious to engage them so they know I am alert and watching and away I go. Wouldn't be above running over them on Biscuit. Ran into a guy hunting last year illegally. Dang...city guy told us they arrested him and he is still in jail.
So yeah....we run into a few creeps but for the most part I feel safe out there even by myself. They so are not interested in me.