i think its 21 because most high school seniors are 18. that means they buy it, have a party, and the whole school goes and can drink. if its 18, then a lot more kids will be able to aquire alcohol a lot easier.
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I have a different stance on abortion: I'm against abortion, but for killing babies. That way everyone loses, and I win. I'm neither pro choice, nor pro life; I'm pro you-shutting-the-hell-up. The only way I'd be 'pro choice' is if it meant I could choose which babies I could abort, and only then if I could lift the age restriction to 80.