RSS, Email, Privacy, and feedback

After reading the article about RSS vs. email I wonder what the possibility for tracking of receipt and clickthrough of a RSS newsletter is. How easy is it to see who gets the newsletter, how can we target them, how can we track who opens the piece (be it an email or RSS thingy (post? article? what should I call this?) and how people respond to it?

One other thing:
How long will it take for someone to steal and massively misuse a political email list? That is, if it hasn't already happened. With the latest news from that 40 million records, involving MasterCard and Visa, having been compromised at CardSystems Solutions how can it not be a matter of time until someone cracks a campaign or advocacy group's database?