As wonko said, the signs read like this:
Red means STOP! in Beaverton.
There's another variation they've put up that says this:
Collisions are not accidents. Really!
Obviously, these are stupid, stupid things. And they must be stopped.
I'm currently in the planning stages of a guerilla meme war with the dumb bastards who put these things up. My plan is to get the following signs made, and then stick them all around town, in the hopes that the fuckwits will get the message.
The SKY! is blue in Beaverton.
Birds do not fly. Really!
So if you wake up some morning and see one of these signs on the light pole in front of your house, you'll know who put it there.
As I said, I'm in the planning stages, and haven't yet had the signs made. So if you have any suggestions, feel free to let me know.