eh.... other than looking at kiddie pr0n (which i know none of you do.....er nevermind) what do you have to worry about? seriously. That you're straight? Gay? Lesbian? Have fetishes? Who cares. Unless you're looking up ways to destroy the earth, or commite a crime, it's no big deal.
But I do agree that it is infringing upon your right to your privacy. Which should (or i think is?) one of your freedoms. Yes, F*ck comcast for doing it it's none of their business, but.... i don't think it's anything too serious... unless someone wants to find out about you personally.
-Dave