Yeah the last TA I opened the door to a seemingly unoccupied port a john to the sight of a contractor pleasuring himself. Unsettling.
One time I had an overnight layover and I was too cheap to get a hotel. I was afraid of getting my bag stolen or being molested while sleeping at the gate so I locked myself in a family restroom. Laid out on the changing table and slept well. Since it was overnight it was clean.