As stated, each state is different on trespassing laws and how to mark your property. I would take the suggestions about talking to your local law enforcement agency about what happened and probably would talk to a lawyer too. Don't be a jerk about it but don't back down either. It is your land and as long as there are no county or state laws prohibiting you from shooting on your property, then enjoy yourself in a safe manner.
Here in Missouri, posts and/or trees painted with purple paint is the same as putting up No Trespassing signs. If it was me, I would mark the boundaries of my property per state laws. I would then add some type of fence around the sides and back of my range area with warning/danger signs that it is a shooting range. The fence around your range can be simple as some short T posts and one strand of wire with signs every so many feet. That is how the Mo Department of Conservation marks the boundaries of all their shooting ranges.
Trespassing in wrong no matter what the circumstances are and the neighbors coming over the backstop/berm was down right dangerous and stupid.
Here in Missouri, posts and/or trees painted with purple paint is the same as putting up No Trespassing signs. If it was me, I would mark the boundaries of my property per state laws. I would then add some type of fence around the sides and back of my range area with warning/danger signs that it is a shooting range. The fence around your range can be simple as some short T posts and one strand of wire with signs every so many feet. That is how the Mo Department of Conservation marks the boundaries of all their shooting ranges.
Trespassing in wrong no matter what the circumstances are and the neighbors coming over the backstop/berm was down right dangerous and stupid.