

I didn’t think I had one, but when I read yours I remembered mine.
If I see someone parked carelessly all the way over in the side of the space, I’ll park nice and neatly right in the middle of the space next to them, not allowing any extra space for their selfishness. I’m OK with squeezing in and out, and my car is much older and less valuable than any of theirs if they damage it, so I feel like I’m doing society a small service by making my weird passive-aggressive point this way.
My pet peeve is this but for signage in general. Workers put out a temporary flood or road narrows sign, but forget to remove it again, the net effect is just people learn to not notice signs as much, and works against safety.
Still regularly see signs about masks obligatory, keep 2 m distance, and one-way systems from covid. They’re just part of the background now, people don’t even see them. And next time they’ll be that much less effective.