IMHO, the "decision factor" in this situation is whether or not the person's activity is voluntary.

Snoring really isn't voluntary. People who snore, snore. That's all there is to it. I think it's up to us to deal with it. If you are a frequent traveler who is bothered by snorers -- bring earplugs or headphones!

To provide a counterexample:

Kicking the back of my seat is (most likely) voluntary. I don't care how old or young you are. You need to exercise some self control and avoid repeatedly kicking my seat. If you don't, I'll remind you kindly of your obligations -- once -- and then get serious about stopping the action.

Make sense?