Don't touch that tap
Geoffrey at Dog Snot Diary posts a very funny YouTube that shows how easy it is to get people to sign a petition to ban anything. Especially if an attractive young woman is collecting the signatures. But to be fair to the signers, water can actually kill you.
Which illustrates how stupid drug prohibition is. Anything taken to excess can harm you. It doesn't make any more sense to ban drugs that are only harmful if they're not used responsibly than it would be ban water.