Heh, I've been compiling the same list as you already did. My results look a lot like yours.
What do you mean that it is "very dangerous"?
As I posted in another thread... I wonder if it is significant that so many of the UDIDs are known to OpenFeint. If you took a random sample of UDIDs, how many would OpenFeint have data on?
You might want to ask whether users have installed any game associated with OpenFeint. Some examples are listed on their Wikipedia page: http://en.wikipedia.org/wiki/OpenFeint.
I've been fetching results from the openfeint api for a bunch of the UDID's. I'm not sure, but it may be significant that so many of the UDIDs get a result from the API. Shouldn't openfeint only know about the UDID if the user has played some game in their network? And wouldn't we expect that to be a distinct minority of the total population of all ipad/iphone owners?
What do you mean that it is "very dangerous"?
As I posted in another thread... I wonder if it is significant that so many of the UDIDs are known to OpenFeint. If you took a random sample of UDIDs, how many would OpenFeint have data on?