How old is too old to trick or treat?

The age old question "how old is too old to trick or treat?" is buzzing on many minds this Halloween. If you have to ask yourself said question, you are too old. Nothing is worse than giving candy to drunk and high high school students on Halloween. Its disheartening and slightly disturbing to see a bunch of young adults taking part in such a childish holiday. I personally stopped trick or treating in 3rd grade because I didn't see the pros to it. I'm not saying that 3rd grade is the right time to stop, I’m saying that if you feel stupid doing it or feel you look stupid doing it, then don't do it. But if your in high school, for gods sake, you should be giving out candy and working rather than going door to door in a stupid costume asking for it.