I love the idea, but getting exjws to participate in a coordinated effort is much harder than getting brainwashed masses to do so. I've had a number of ideas, but heck, I couldn't even get my local exjws to join me on my first Shunniversary. They all backed out but one childhood friend.
The number of people that are actually active in the community I think might be quite small. Most of the exjws I personally know, okay all of them, do no activism, aren't on any forums, just disavow it all.
Love the idea. I've though it would be cool if all of the shunned ones out here picked a meeting and we all just showed up to it all over. No signs or anything disruptive other than our presence, to signify that we're all still here. Executing this stuff is a whole other ballgame.
I'd love to see you get momentum and don't mean to be a downer, but I just want you to have a view of what you're up against. Like herding cats. (DOC beat me to it!)