I live in one of those state Californians are moving to, and the hate for them is simply epic. I keep thinking it would be amusing to give out bumper stickers

I live in one of those state Californians are moving to, and the hate for them is simply epic. I keep thinking it would be amusing to give out bumper stickers that change in the rain -- with text to the effect of "STAY OUT", or "GO HOME", and a red circle/slash over an image of California. When it rains, the image of California changes to an image of Mexico.