I agree that the sense of entitlement can get a little overblown sometimes.
For example, a few years ago we were section hiking some part of the trail in Virginia and came upon some trail magic in the form of a cooler with a hand-lettered sign taped on the lid. This was the first time we'd ever run across a cooler on the trail, so we were naturally curious. I was standing over it, reading the sign and thinking, "Wow, this is neat, I should take a photo," when a thru-hiker that we'd passed earlier on the trail came up. "You didn't take any drinks from that, did you?" was the first thing he blurted out. No hello, no nothing. "Because that's just for thru-hikers." We hadn't actually talked to the guy, how could he know if we were thru-hikers or not. How rude and presumptuous can you get?