SANS - excellent. From an outsider's viewpoint (never was jw) the reason for the anonymity being necessary is what would get the media's attention. That this religion has captive members, and how many lost their families after they left.
SHUNNING should be at the lead. It is the reason for SANS. (Captive members who don't believe - stay in just to keep their families and "friends"))
The threat of shunning is what causes jws to obey the stupid blood policy.
Threat of shunning is why jws allow the horrible pedophile protection coverups by not going to the police, and it's why abuse victims stay silent.
And a very simple logo of a wall being broken through (OnTheWayOut once had an avatar like that here). Maybe a graphic of notched battlements at the top of the wall like on the JW watchtower if it could be similar but not enough to cause WT to sue.
To avoid that maybe a watchtower in the style of the Nazi POW camps being cut through at the bottom.
As few words as possible - so it can be read easily and quickly. Links to articles or court papers could be provided for the details.
I wouldn't make any mysterious lead ups - I never take the time to open threads that don't have a clear title.
As simple and clear as possible.