Originally Posted by Wildwood

Too many campers are exercising their 2nd amendment rights.
Avoid contact.
Remain safe.
You are in the USA - the most gun violent Nation on Earth.

And for building shelters on public land - that's not permitted. As a Wilderness Ranger for the Forest Service, I spent many hours disassembling and scattering improvised wooden shelters. Rules in National Parks are even tighter, and every Ranger is a police person.