On xfinity.com, it says "we value your privacy."
If that were true, when we sign in for whatever reason, we should be getting secure (HTTPS) connections. Not only that, but this site connects to other services that have invalid security certificates (e.g. akamai).
So, basically, this is a party line, and we're being sniffed, analyzed, marketed, profiled and undoubtedly sold to others. We are already paying for Comcast, so we deserve better than being used as yet another source of Comcast's income. Are we just fodder for the the ever-growing mobs of internet information brokers and parasites?
So give us some actual privacy!