All alliteration aside, Scientology has a history of harassing its critics in and out of the courts. So now there is a movement of protestors illuminating problems with the Church of Scientology that is remains masked. Electronically distorted voices narrate YouTube videos about Scientology,. Demonstrations outside Scientology facilities have been manned by people wearing masks (and playing "Never Gonna Give You Up" on boom boxes, creating the largest public Rick-Rolls).
I doubt they were trying to emulate comic book vigilantes, (in spite of the frequent appearances of Guy Fawkes masks, as used in V for Vendetta), but the theatricality of it all captures all the trappings of them (without the fighting, of course).
Normally I find anonymous speech less persuasive and a touch cowardly. But knowing Scientology's tactics with critics. It's justified, and highlights some of what is wrong with it.
I also usually find protest movements pointless as they often do not educate or persuade anyone, and are more to make the protestors think they are actually doing something. But I the unique flair that's been brought to this anonymous campaign I think has a chance of attracting the attention of people who will then seek out the more substantive arguments against Scientology.