This is all rather unfair and silly though... Its a wide open space at Avebury no one will be forcing you to stand and listen anyway. I (as a neutral non-religo) have walked round and listened to Terry on a couple of Pagan events and not been affected by anything he said ;) - and it is a 'special event' in the Pagan calendar with more pagans coming from afar needing camping facilities..
As for 'scurrilous' remarks on other websites bought on to TMA thats not on....