yeah, something similar happened when i lived in an apt complex with my mom. these bitches that lived up stairs from us kept sabotaging us and our laundry. putting bleach or dirt in the dryer, stuff like that. we talked to the apt owner or w.e. and got them evicted, haha. but i know you answered about it already, but you should try to get something done about that, especially because he could be seen as like a predator or w.e., especially since you're a woman, and its just creepy. i'd try to get something done if i were you though, definitely, cause thats not cool.