If the BB person the OP is talking about is who I think it is, I seriously doubt she'd mind She's referred to BB, in vague terms and in no way negative, in her blog. It's just something she moved on from and onto her blog Anything more private wouldn't have been in an area accessible to all members, or in a PSG, which come with their own disclosure understandings, anyway.
I had a BB member identify herself to me and we are now friends. I don't advertise my membership now, because like a PP says, I'm in a smaller population. No biggie if I'm 'outed' though - it's all consistent here as with my IRL!