>What are you tracking, how is it used, and how can I be confident it won't be abused? Because of the nature of computer security, you cannot be certain that a

>What are you tracking, how is it used, and how can I be confident it won't be abused? Because of the nature of computer security, you cannot be certain that any data that you give to a 3rd party will be secure. Once it leaves your machine, it's out of your control, forever. Maybe an initially privacy friendly policy vanishes once the company is bought out, or a data breach occurs and the data is suddenly indefinitely in the public domain. This doesn't just apply to Facebook, it applies to every single company storing data. The only way to prevent is to have a data retention policy and invest heavily in security, which pretty much nobody does except for the really big players.