Why isn't I Know What You Did Last Summer part of the standard school curriculum yet? College-age kids need to know that, if they accidentally kill someone and subsequently try to cover it up, someone will inevitably know what they did last summer, put on a murderin' hood, and come for revenge. Get IKWYDLS into classrooms. Let the children know it's better to confess their crimes and face the consequences than to face the wrath of a hooded serial killer. Or at least let them know that I Know What You Did Last Summer exists so that they won't grow up and make it again:
"Oh, we're chopping up the body? OK, I'll start by plunging a tire iron into her heart. That's chopping up, right? I'm helping?"
Also, Carrie Fisher is the killer.