Actually if they wanted to ban alcohol they could have banned it completely rather than giving the excuse of age...It seems quite funny to me though that voting age and marriage age are less than then the age of consumption of alcohol...
I do not favor selective ban. The persons above eighteen years are adults. I think that any one who earns and is of independent means has to take his own decision as to what is good for him or her. As regards students above 18 years age and still depending on parents, it is for family and not government to regulate drinking.
I think it`s not going to work. The prohibition already happened in many states and more illegal activities took place then ever because people were drinking illegally.....