a pet peeve

I'm not sure who came up with the phrase "pet peeve" to describe things that really annoy you. And if what I'm about to share applies to you, then you need help!

Twice in the recent past have I gone into a restaurant's restroom only to find that previous "occupant" failed to flush. What type of person goes into a restroom and leaves a parting gift for the next person? I would expect this if I were visiting my elementary-age daughters at their school -- it's the type of thing an eight-year-old boy would do.

On encountering my first "gift," not only did the previous person refuse to flush, it also appeared he was never trained to aim. Perhaps we need to leave a few Cheerios in our public restrooms and consider it a civic duty.