Well I can show you how the locking mechanism works on the door of the empty horse-shed if you like.
Failing that shall we turn up on the idiot's doorstep and explain how jolly unreasonable we think he's been, I'm sure he'd like to engage in a civilised discussion about it.
Maybe it'd be more productive to make a list of all the people who own land with henges on, and write them a letter asking them to look after the damn things, if it's not on English Heritage's to-do list.
Option four, bang head repeatedly on a standing stone.
Your pick Goffik, or maybe you have a better suggestion :)