There may be lot of problems with diversity in Facebook, but you can't really be harassed on Blind: it's all about getting real raw opinions. If you don't want that, don't use Blind.
In that sense, the middle school analogy is apt considering how people can behave.
I mean it sucks that the world has racists, bigots, homophobes and all tons of other sorts of rubbish people. But you can’t really fault a company for the fact that they manage to get hired as long as they are dealt with when they are actually discovered.
Where they supposed to ban every employee from making any kind of anonymous comments online after this case?
The point is that it provides: hard data about the whispering campaign going on behind your back, the conversations from which you are excluded.
that the harassment does actually exist, and is not a mere allegation by you being paranoid.
that other people can go verify the hostile attitudes and expressions for themselves.
provides real, externally verifiable evidence of problems at facebook, not coming merely from the famous "disgruntled ex-employee"
Stop trying to minimize serious issues (and if you do want to minimize them, at least make sound points that are better than trivial sophistry, a half step up from complaining about typos).
Your logic is absolutely absurd. Acting like people 'don't just start attacking someone for fun' ignores the fact that people can and do face racism, sexism, transphobia and so forth. Especially when she clearly encountered transphobic comments, some of which I even saw spread here on HN.