"Do you plan to out yourself to act as the plaintiff?"

No, but can a foundation act as the plaintiff?

"If you want to set up an anonymous class-action how do you intend to protect against a John Doe Subpoena?"

I don't understand your question. My knowledge of law is lacking.

"This is where off-the-shelf solutions written without a specific cause or specific info to protect are often better than those where you've had to 'out' your agenda to another."

Sure, the idea of having a GL flag floating atop our headquarter sounds cool too, but I have some pragmatic sense.

While completely avoiding being spied on is a noble goal, it's not possible and we can still achieve greatly even under such conditions.