it's certainly bad etiquette to do so if other people are camped near by.
Thank you for clarifying Rogue. I was concerned about factions of gun lovers going out and shooting up a storm just for fun. It's not written in the constitution that we have a right to sleep, but I would argue at 2am, our right to sleep trumps the right to generate excessive noise, whether it be from guns or boom boxes. Violating basic courtesies would be a good way to start losing such rights. Of course actual enforcement of any rules in the middle of nowhere can be an issue.
On a separate note we do find on occasions a hunter that will fire off a few rounds, but it almost always ends shortly and isn't too big of a deal. We've been more fortunate than Sean. More disturbing is my last two trips into the forest we've found clay skeets lying trailside shattered. I hope the people who shot them were well aware of their surroundings but I really have to wonder.