Why not just require all groups to provide their names to a "registry"?
Thus anyone can just look and be informed.
Thus if a christian group is going to have a group attendance at six flags ALL who would be offended by the presence of christian groups. (linda ronstat) can stay home.
It is worth noting that Dollywood asked a homosexual group to NOT use her logo or in any way imply an official Dollywood homosexual event.
(seriously are homosexual that scared that people will keep their children home on those days? and why would it matter to them?)
Because not all groups are on the same moral plateau.