During covid (2020), there was a new guy working at the building I live in, young dude around early 30s.
I was doing some cleaning and offered him some art supplies for his kids, he said "i don't have kids, thanks" and that was it.
A few days later, I saw him cleaning my floor and he asked me if I could borrow him a charger, which I did. I wasn't thinking and let my door a little bit open... when I turned around to hand him the charger, he was peeping inside my place. Creepy.
The following week, he knocked at my door again and I ignored him. I waited a few seconds and put some music. Guess who knocked twice??? And loud! The cleaning dude. That afternoon i reported him with one of the older guys that work in the building and a few days later the young dude was dismissed.
I really hated not feeling secure at my own apartment.