these things are getting banned on my campus too. but i don't think the ban is going nation-wide.

the main problem is that they have caffeine, so the drunkedness gets masked way too easily and you feel better than you are. plus the carbonation increases the rate alcohol's absorbed (aka, they might have equivolent of 3 glasses of beer per can, but when you drink one over the course of a half hour it's like you slammed back those 3 beers in one long chug)