But only to sue you when you are doing nasty things, that are against the license and they get wind about it. Regardless of that it doesn't work to backward-identify you, it was necessary to the legal aspect of their side of the license to have restricted access. Else this licence simply wouldn't work.
Also, if you click through to the link posted up thread and go to "files" to try and download them, it explicitly says
That may be boilerplate but it certainly implies they're taking your information, not just asking you to agree to a license.