Let me understand this correctly. You found Comcast's DNS isn't perfect and doesn't resolve some names. It does not appear to be malicious in any way, as the two domains you find affected are a foreign furniture store, and your friend's brand new website. It's fairly obviously a bug.
So: you call Comcast Tech support, demand to talk to the Boss of Comcast, and then write a 10,000 word article (I didn't count) about it on Slashdot where you know 90% of the readers will take "Websites inaccessible on Comcast" as meaning "OUT OF CONTROL MEGACORP MONOPOLIST COMCAST IS CENSORING WEBSITES!!!"
This makes sense to you? This is what you do? Really? Really?
Just curious, but that time you got a duff cable modem and had to send it back, did you write a 60,000 article on how Comcast has banned you from the Internet, and did you demand to speak to the PRESIDENT OF THE INTERNET? When it rained that one time and you attempted to tune in the cable TV, only to find many of your channels were inaccessible, did you write a 75,000 word article on how COMCAST IS DROPPING CHANNELS and did you call tech support demanding to talk to THE LORD HIGH RULER OF TV?
I think I've found an article where the discussion would be likely improved for once if the Betoddlers spammed it with anti-Beta comments.