While out on a hike through a wooded area in northern Illinois, I came across some trees that legit had purple paint on them!

Numbers on trees are usually to tally them before a harvest. In many states, purple paint is a universal sign of a property boundary, which means no trespassing. The U.S. Forest Service (USFS ...

If you’re trying to keep strangers off your land, you may soon have a colorful alternative to a “no trespassing” sign.