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So...if I had somebody else's UDID, what could I do their phone? Scaremongering indeed. yawns

P.S. Being an owner of an app review blog, I give my UDID out frequently.

If you can match the UUID to a real name and make the user use your app/website frequently, you've pretty much everything to track her/him (add geo if you wish).

He/She cannot escape/opt out.

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