Cool idea, but of course the very first image I clicked into was a dick.
First thing I saw was a Swastika. It was painted on an ex Nazi building, but still...
Haha yeah, can't have nice things I guess. I'm currently working on automated moderation to catch that stuff faster. In the meantime, Report button exists if you stumble into anything awful.
I recently learned that in Bhutan, they are sacred smybols since a long time
https://en.wikipedia.org/wiki/Phallus_paintings_in_Bhutan
Since I know that, I am rather amused every time I see a dick painted anywhere.