Somebody should organise a picket at their protest and show them the real meaning of Idol worship... by hiring a load of Billy Idol tribute bands and flat bed trucks with massive sound systems to drown out their hate.
I know it's a pun, but a pun is the last thing they'll expect and I think being confronted with hundreds of people all dressed as Billy Idol, singing 'White Wedding' in unison, would really mess up their game plan, and really piss them off when the penny drops and they work recognise the pun.
Alternatively, you could always take the Life of Brian approach and get hundreds of people to start worshipping them as the Messaih, folowing them around everywhere and venerating any object the drop.