Ya, everyone has different sized personal space zones in every day life and hunting. Mine are larger than most are, I'm sure. I use a 14x16 wall tent solo, my space is important to me. There are some rivers where fly fishermen are 30 feet apart. I like to have at least a mile of river to myself, and I will fish every bit of that.
In this instance, the guy had a drop camp. You don't pay for a drop camp to have four guys move in and set up on the ridge above your camp. Yes, it's public land. But if I hiked in and found a drop camp, I'm then at least two miles too close to said drop camp and I'm moving on.
Since 2010 I've had five different ML hunters shoot bulls out from under me while working those bulls during archery season. All but one of those was within 100 yards, and I had no idea any of those hunters were even in the area. That's always disappointing, but it's never made me mad. Getting mad is a choice.