Re: Won't someone think of the 3 million?
If they're doing it to cut debt load, they'll be selling off the bit of Comcast that serves those 3m - so they wouldn't just switch off service to a bunch of customers. Even if they did switch it off (probably not allowed by the local regulator), someone else would want to take over the existing wires and run a service: the expensive bit, all the digging to put in the wires, is already done and paid for.
Comcast don't seem that bad by comparison - the UK only has a single cable company now (still named Virgin, but now owned by Liberty) - with no plans for IPv6, no static IP options - though at 120/11.7 Mbps, they're theoretically the fastest around, apart from harshly traffic shaping anything they consider P2P traffic and being coy about the details.