Its more an individual thing than an age thing. Yeah, this guy is apparently pretty inconsiderate, but I've seen that in people of all ages. In fact, some of the most stubborn, arrogant, entitled people I've met are older. Some seem to think they're owed something just because they've been around longer. So, again, its not an age thing. Sorry to hear the guy is making a pest of himself. It sounds like you'll have to find a diplomatic way to fix things so you all don't lose permission to hunt there. Never a fun situation.