Using the paint is akin to posting a "No Trespassing" sign, although not everyone knows what it means. So far, more than 20 states have a "purple paint law" in place, the Hudson Valley Post reported.

This might look out of place to most people, but in the eyes of the law, it couldn’t be a clearer sign. In essence, purple paint can be seen as a “Keep Out” sign for private land in Kansas.