Some joker has taken it upon himself to post dozens of signs that read "Think That You Might Be Wrong" on telephone poles and street signs around New Orleans. Isn't that wonderful? I don't think so, and I encourage people to remove these signs in their neighborhoods, for a couple of reasons.
First, the signs are obnoxious in that the person posting them assumes that he is doing us a service. Not knowing this guy, his logic is unknown -- maybe he hopes that criminals will pause to reflect before committing a crime or that racists will take a look in the mirror and see the error of their ways. Whatever the motive, most people are indifferent to the signs, a few like them, and a few dislike them, finding them ugly and amateurish and feeling it's annoying to be hit over the head with the same slogan every time they go outside. Given that some people don't like them, it's rude for someone to presume he knows what's in the community's best interest.
Second, they add to the city's blight problem. Under the New Orleans City Code, it's illegal to put signs on telephone poles, and citizens may dispose of them as trash. Now laws can be unjust and people may feel justified in breaking them in such cases. Is this such a case? I don't think so. If it were legal to post such signs, soon the entire city would be covered with them, whether from other people with a message or businesses hawking their services or wares. Many neighborhoods are already covered with such "street spam" -- as I've argued elsewhere, these signs make the city look bad and bring down everyone's quality of life.
The bottom line is that people are free to post signs saying whatever they want on their private property, such as their T-shirts, car bumpers, lawn or forehead. But it's silly to put "bumper sticker"-type signs on public property and subject the rest of us to them. So get out there with a ladder and a hammer or a wrench and help clean up the city by removing these signs.
I welcome others' views on this topic, so feel free to leave a comment, even if you disagree.