This week, there have been two -- and it's only Tuesday.
On Sunday, it was discovered that the 900 million-person social network was "testing" a feature that would let people see a digital list of the people who were nearby in real life. Called "Find Friends Nearby," the app was pulled down by Tuesday morning after the Internet freaked out. Commenters said things like "Hell to the naw" and "BAD FACEBOOK!!" and generally complaining that the feature, which was difficult to find, much less use, invades privacy and will lead to stalking.
If that's not enough, a company named Friendthem reportedly threatened a lawsuit, saying Facebook stole its idea for the location-aware feature. Apparently, Friendthem would like to share the heat.
Item two: A blogger noticed over the weekend that Facebook, without asking permission, had changed the default e-mail addresses of all of its digital residents to @facebook.com accounts. It's easy enough to change back, as the site Lifehacker and others have detailed, but that little invasion of the hub of digital identity -- the Facebook Timeline -- was enough to make quite a few Facebookers fire back at their digital overlords. Security researchers called the move dangerous. Normal people felt violated.