^^^^^THIS^^^^^^^^^^This!^^^^
Most of the pastures and fields we played in belonged to family members.
Purple paint is a big thing in Texas and has been for several years now. But unless people know and understand what it means, it by itself won't stop trespassers. If the signs and purple paint are not getting the message across, catching the tresspassers and having them arrested and charged will send a very loud and clear message across.
Signs and paint are the warning. Enforcement is needed to drive home the point.