Bruce and danah are arguing from completely different perspectives. I think danah's talk needs to be read in its entirety - it fits in also with some of her other work around the demographic and ethnographic issues around social networks http://www.danah.org/papers/talks/2010/SXSW2010.html
People in that group are least likely to be discriminated against, and therefore have the least to hide online. Poor black lesbians have more reason to be defensive.
Not to mention that our SXSW interlocutor in question is herself a member of the privileged, white group, and therefore presumably at least partly suspect.
Oh yes. Only working-class, black lesbians ever get anything right regarding technological social policy.
Seriously, what's with the prejudiced headline? Privacy is good. You don't have to diss entire categories of people to argue for that.