Be careful -- practically speaking, using Comcast's and TWC's names/logos is more likely to attract their attention early, and will give their lawyers a stronger argument (against Github or third-party sites) to have it taken down.
I've edited to be clearer -- I'm referring to the use of Comcast's (and Time Warner's) logos, not the FCC's.
I agree that there are fair use arguments, which is why I said "practically": hosts take down fair-use content every day. A subset of that is eventually restored, but only after the parties have argued it out (frequently through their lawyers).
