Drinking age

The decision to make the drinking age 21 has always been disputed between our country and even the world.  To me it always comes back to the point that, if an 18 year old can go off and risk his life for his country then he should have the freedom to drink when he pleases.  To my knowledge, the only thing that a person below the age of 21 can not do is gamble (depending on the state) and drink alcohol.  By giving 18 year olds the responsibilities of an adult, then there shouldn't be any restrictions at all.  I have never been a crazy drinker, but based on logic it makes perfect sense for an 18 year old to drink when and what they want.  In one of my favorite movies, "Thank you for Smoking" they talk about how bad cigarettes are for the body.  The main character defends it by saying that distributing cheese and other unhealthy foods are just as harmful as cigarettes because of the nutrition factors.  I love this part because it really puts in perspective that it isn't always the product thats harming people, but the consumer and his/her choices.  I saw a bumper sticker that said "if guns kill people, then pencils misspell words"  Once again it shows that it isnt the product its the consumer.  So if an 18 year old, who is considered to be an adult, wants to drink alcohol then he should be able to.