Whew. Talk about left field ---where did the poster even remotely suggest that his parents didn't know about the offense? Law, and the study of such is precise. You are assuming. Telling the poster to inform his parents when he very well may already be a legal adult in his state is not accurate.

The legal age at which one is considered an adult in his state may be different from the age at which drinking is allowed. This may mean that he is, in fact, already an adult for other purposes such as being held accountable for his actions, but has not yet reached the legal DRINKING age. If his state has determined that once a child turns 18 he is no longer a minor, this means he doesn't HAVE to tell his parents anything at all.

Just because the legal age of drinking is 21 doesn't mean that at 18 he isn't lawfully an adult and as such has a right to privacy and the right to handle this without his parents input, should he see fit.

(Nevermind that the original question was posted months ago, and the poster has, no doubt, long since left).