Don't worry, I'm not going to 'out' anybody or anything, (even with veiled threats tossed nonchalantly in my direction) but really, if they think they are currently in any way protected, and are worried about being found out, then I would advise they walk away from it now, as it would be pretty delusional to think they wouldn't be found if looked for.

There is no need to 'disclose' their identities, but thinking that not having their voices on a track is any kind of protection is a bit silly.