[kujenga]

Facebook is already battling pretty large privacy concerns with a lot of media scrutiny. There's a lot of danger in having a tool like the graph search available to people with malicious intent. The EFF had a good post on the subject from back when it was active [1].

When you're part of a network as big as Facebook's, at a certain point your own privacy settings don't matter very much, because the people you're connected to can generally fill in the gaps about whatever you may want to keep private.

[1] https://www.eff.org/deeplinks/2013/01/facebook-graph-search-...

[foepys]

It's imortant to keep in mind that metadata alone says a lot about a person. Combine that with more precise data from a few people in the same set and you can end up with very accurate data about everybody.

[aminorex]

Accurate enough to kill people, according to James Clapper.