I once had a deduction from my deposit for a paintbrush and can of paint left on top of a kitchen cabinet; it had been left by their team when I moved in.
I have some paint in a cabinet which was leftover from when I moved in. I figured it might be useful if I need to touch up anything (although I haven't used it in 2 years yet, so it might not be good anymore). At first I thought that another person's comment was weird, before realizing I'm basically the same, except that I leave the paint in a cabinet.
Also, ADHD was a factor haha. Getting the dishes done and keeping the place tidy was enough of a struggle without extracurricular activities like the disposal of paint cans!