That's because you're wrong. I'm right and you are wrong. I've got data and a ton of experience to show my point. You are wrong.
By telling them that words have no consequences...boo hoo suck it up kid? That's so helpful, guy.
Of course parent involvement needs to happen. Everyone (parents, students, parents to students, teachers to students, etc etc.) has to become involved and accept bullying for what it is instead of pretending it doesn't exist, that it's innocent, and so on. Cyber bullying is real.
It's become more acceptable for adults to claim that online threats and remarks are hurtful, scary, and so on, but damned if a kid can say the same thing. We expect kids to put up with more crap than we'd ever accept an adult to go through without sympathetic comment and outrage. Good God man, every several months on this forum we have people ranting about the online harassment people get for having their political or religious beliefs becoming a target for online threats and harassment. But children who go through it are just a bunch of pansies. They need to suck it up.
Good lord. What sort of sick twisted reality do you people live in where you put vulnerable kids through the gauntlet, but won't subjugate yourselves to that sort of abuse?
You're also presuming that the parent doesn't have to go through school administrators so they can do their investigations too. The fun part is watching schools circle the wagons to undermine the idea that anyone did anything during school hours and a kid just somehow got their facts wrong or that no one saw anything.