Good post, Jennifer. I discovered that third privacy loophole at SXSW, when I deliberately choose NOT to share my location publicly on Twitter in certain instances and yet still had my location "announced" when people I was connected with checked in at the same location later.
I tweeted my concern to Dennis Crowley (@dens), who indicated this should *not* be happening and that he would look into it. But a message I left on his Facebook Wall a few days ago asking whether the problem had been addressed went unanswered.
I have started using Gowalla in the last couple of weeks. Your fellow privacy/security comrade, Kyle Flaherty, suggests it has better privacy controls!
Bryan Person | @BryanPerson
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