There has been a No Dickhead Policy since the early 90s. In part it means looking after yourself and others. In part it just means treating each other with respect.
If you are a dickhead, this festival isn’t for you. If you have a dickhead mate, please leave them at home. Dickheads, or people doing dickhead things, will usually find that someone firmly but politely lets them know that their dickhead behaviour is not admired or appreciated. The dickhead will usually realise they are being a dickhead and pull their head in. If not, they’ll need to leave.