What's the difference between that and installing Google Analytics on your website?
The better question is: What's the difference between this and a desktop application that gathers your data?
If the same thing happened with a desktop app (spying on your every click, "calling home"), it was labeled as spyware within days.
Its a delicate situation, but as a developer I have to be trustworthy - and I think this is best reflected in the changes I make that make users think my app is worth using, more and more ..
My intuition right now is that they're pseudonymous at best, and that the average user is very quick to provide credentials that would associate the pseudonym to their actual names and other personal info.
Can anyone provide an assessment (or better yet, a link to one) on just how anonymous those anonymous devices are?
(@saddino: this response is not directed at you partly because I'm not sure whether you're being technical or sarcastic — or both.)
Its very trackable. You can get a unique ID, user name, location, and so on. There is no anonymity with cell phones, really - its a farce.