Where does it look like I am I saying that multiple agencies would coordinate sharing FB data? I feel that the parent post was needlessly worrying about a risk of e.g. border teams using unlocked phones as a routine way to harvest data and hand it over to e.g. NSA or whatever "evil government" snooping agency they'd be worried about, because (a) NSA doesn't need this assistance because they are likely to have better mass collection methods on their own, and (b) they wouldn't coordinate this with a large number of DHS grunts, neither by asking them to gather data nor by providing them with a list of all data that they have. DHS is likely to have a lot of data themselves, but anyway unlocking a phone provides extra information in a simple&practical manner.