The complete lack of respect that just about EVERYONE shows for the cleanliness of a public bathroom. I deal with this at work every single day, and I work at a professional, Fortune 500 company.
Every time I go in the bathroom, there is either piss all over every toilet seat, or the toilets have been clogged with paper towels.
Who in the actual fuck doesn't know that you can't put paper towels into a toilet? I feel like I work with a bunch of adult children who don't know how to use the bathroom.