Self-awareness is a skill, but there's nowhere to take lessons. These facepalm-worthy moments of immense human moronic ability are a good reminder that most of us are playing with a full deck in the brain department, even if we don't feel like it sometimes. It's everyone else we need to be worried about.
We may lock ourselves out of our houses from time to time, but at least we're not posting one-star reviews of national parks complaining that the animals are loose, or the police officer who claimed Burger King put dirt in his food only for people to learn later on that it was regular ol' food seasoning That's some facepalm-level behavior that we can keep a little bit of distance from, at least most of the time. Anyway, next time you see a bizarre purple symbol on a car windshield, you might want to check whether or not it's the musician Prince's symbol first before asking the internet a silly question.