BITE control means nothing to them and will not likely entice them much. And besides, if the used car salesman was a JW, they WOULD buy a car from him! Calling it a dangerous cult will keep all but the total apostates already in attendance from giving it a second glance. I like the headline though.
My understanding is that they have parking lot patrols, so getting on site might be difficult. Can you get a nearby location and use banners/posters?