Joel Housman flags some specious fear-mongering in NBC News’s scoop on the source of those leaked UDIDs:
When matched with other information, the UDID can be used to track
users’ app usage, social media usage or location. It could also be
used to “push” potentially dangerous applications onto users’
The way this paragraph is written, it would leave the average
reader to believe that any of the leaked 12 million UDIDs could be
used to push malware onto the respective iOS devices they belong
to. This is a blatant lie.