Should the drinking age be lowered?

Ever since Wisconsin was the last state to up the drinking age to 21 because of threats of cut funding, there has been a fight for bringing the drinking age back to 18. My parents remember back in college they would sometimes go out on a date to the bar and have fun. Memories like this have lead some parents to push for lowering the drinking age and there isn't much opposition from teens.
Drinking is only a problem in excess. When you turn 18 you are considered an adult and able to make your own decisions. Why can't you also choose how much to drink? You can go to jail for as long as any other adult but you can't have alcohol without getting and underage ticket. Some U.S. students go over to Canada because the drinking age over there is 18. Sarah Rafson a University of Toronto junior say that sure there are drunken college parties in this city. But she swears she sees fewer instances of her peers slamming down drink after drink than she does in the United States. Her own birthday celebration in November, the day she sipped her first legal drop of alcohol, stopped at a couple of drinks, and she says she's been a light drinker since. "It's legal," she said. "It's no big deal." Most kids just get a kick out of it being illegal and the thrill it brings especially if the cops come and they have to run. Lowering it would maybe make it less likely for them to drink heavily.
Then again there are those out there who say that since the drinking age has been lowered, there have been less deaths. But how do they know that they just aren't doing a better job at preventing kids from drinking and driving. Also now we have a taxi system in some states where they will take you from the bar back home so you don't have to drive. MADD has been more prevalent and working. There are also those out there who think we aren't responsible enough to drink till 21. Either way you look at it there probably won't be a change for a while.