Terms and conditions for Glastonbury.... Seems to be a common theme
4. Admission is at ticket holder’s own risk. Glastonbury Festival 2016 Ltd and the Premises Licence Holder will not be held liable for any loss, injuries or damages sustained at the event including damage, theft or losses to property and motor vehicles, if the cause is due to the negligence of the ticket holder or the actions of other patrons or third parties or force majeure.