legal drinking age

i don't think the legal drinking age should be changed from 21 to 18. i don't believe that 18 year olds should even be worried with alcohol. even though 18 is considered the age of adulthood, 18 is also the time when you're supposed to be making life decisions and figuring out what you want to do in life. 18 year olds should be more focused on their futures rather than partying and drinking. 21 is harldy a good age, but i think its more sensible than 18.