Te might say that it's pointless to legalize marijuana whether alcohol is legal or not, because if both are legalized, it would just cause more problems with abuse.

...which, of course, I would counter with a little more Te, by saying that that (a) the necessity of illegal methods to bring drugs into the US causes more deaths and trouble, even within the US, than a few more stoners, (b) illegal usage would decrease among teens if it was totally legal, because it wouldn't be "rebellious" and "special," (c) legality would encourage more programs for responsible use as opposed to usage deterrance, (d) it can be used for many practical medical and manufacturing purposes, (e) so many kids wouldn't get into trouble for petty crimes...I could go on for a long, loooong time