One time I was pretty high and thought of this. In a semi urban area, you find wet cement that was poured for sidewalks, and write inspiring, surreal, funny messages in it. if you time it right, it will be dry and the message will stay. what are they gonna do, tear it up and pour more concrete? if this idea is too hispter feel free to disregard it.
Sweet idea, but if you are going to take the time to plan all of this out you should put something really funny or cool
yeah it is often hard to find wet cement. When i was in middle school my friend drew like 30 dicks in a single panel of wet cement, I wrote a bob marely quote and people asked me a couple days later if i did it haha
the city would probably remove it if it was vulgar. but if its inspirational and creative or something like that they would likely just leave it there.
instead, put sticks or metal peices or letters from a craft store in it, you dont have to time it write the weight will leave an imprint even if it is removed