I totally agree with lowering the drinking age. Remember why the voting age was lowered to 18? Because if you're old enough to kill and die for your country, you're old enough to decide who it's leaders are. How about, if you're old enough to kill and die for your country, you're old enough to have a beer when you come home. That said, most bars near military bases accept a military ID as proof of being legal drinking age whatever your real age is...
I taught Orientation class last semester and I had four international students who thought the drinking age was the cause of so many of our alcohol-related problems and also ridiculous. Back home, one girl had a beer with dinner or whatever with her parents or went out with friends and didn't drink to get drunk, she comes here and can be kicked out of school have her student visa revoked if she's caught with a beer in her hand. All four said they were absolutely astounded by the alcohol abuse in this country.
If you can lease an apartment, get credit cards, join the military, etc, then why are you not responisble enough to drink? Having just turned 21, the answer is: because that's the law. There is no other reason for it. My friends drove more drunk before they turned 21 than they do now, and I know alot of people who were borderline alcoholic who stopped drinking as much once it was legal.
As for the voting age, why would you trust a 16 year old less than an 18 year old? I think it'd be great for the country if 16 year olds voted because then they might actually pick up the habit while they still have the guidance of government and history teachers to make them go do it, rather than once you turn 18 and nobody goes and votes. With such low voter turnout, how could allowing more people to vote hurt anything.