Not enough water
With all the drunkenness, altered mind states and general hyperactivity at a music festival, water should at least be free. At least, if we want kids to stop dying, I'd go a step further and get mobile water stations driving around the grounds, spraying any dehydrated looking kids in the face and giving them a firm wag of the finger. What's even worse is when venues charge, even at a dollar or two a bottle. We already dropped all this money on the ticket, why would I waste $2 on a bottle of water when I could just get into that porta-potty with a straw and find satiation? You think people aren't thinking that? You think that shit hasn't happened?!