There is no basis for a lawsuit, class-action or otherwise.
I wouldn't be so sure of that.
1) Defamation
2) Intentional infliction of emotional distress
3) Invasion of privacy
4) There are stalking laws
5) Possibly extortion related claims down the road
6) Freedom of religion is subject to individual rights which you don't give up when you join the club.
7) The Society is aware of this and is quietly shaking in in its boots but they think the flock is too stupid to figure this out.
8) Wrongful death
9) Class actions are tough unless you go after the money.
10) The laws of other nations might apply.