said by Nerdtalker :

I found this particularly unnerving:

We considered whether some form of metered usage could adequately address the problem. Metered usage would allow us to ensure that we are appropriately distributing the costs of the network usage to those who use the network most. However, metered usage has not been widely accepted in the marketplace, and, in any event, doesn’t directly address the issue of congestion in the network.

Specifically, Comcast’s current P2P management is triggered when the number of P2P uploads in a given area for a particular P2P protocol reaches a certain, pre-determined level, regardless of the level of overall network traffic at that time, and regardless of the time of day when the applicable P2P protocol threshold is reached.

A. publicly organizing their business model with "metered usage" which was not widely accepted in the marketplace nor directly addressing congestion, or
B. secretly blocking uploads using packet forgery methods and also not widely accepted in the marketplace and ALSO not directly addressing congestion