>Imagine an internet where Comcast, AT&T, et al, have such granular control over access to your infrastructure

They already do, tho, we call it port filtering & deep package inspection, and when they do that, people get mighty angry. ;)

Also, you seem to implicitly assume that they'd have come to gain as much power as they have now, but that seems doubtful, given how different this would work.

Also, I think you (unintentionally!) attack a strawman there - the point here consists more of matters like congestion control.

Besides:

I said what I said about hoping for cooperation between RINA & GNUnet for a reason:

RINA lacks the anti-censorship mechanisms of GNUnet, while GNUnet lacks some of the insights from RINA research.

And those anti-censorship mechanisms would make your point entirely moot.