I've never seen it either. But it was a recent discussion topic, and I believe it was RedOne07 that was part of that discussion of the enormous list of companies sharing our data. The biggest thing I imagine that it means to me is numerous companies might use my email address and send me solicitations.
On the subject of unsolicited emails, I always for years had a policy of not using the unsubscribe option for fear of just confirming my email address was in fact a valid one. Well, for some reason now, that is a theory of the past and I use the unsubscribe option frequently.
One thing for sure, our privacy is just a fable now.