"it would be like the operator breaking into the conversation, telling each talker in the voice of the other: "Sorry, I have to hang up. Good bye."

Comcast has the right to manage its network, but this obfuscation of the source of the blocked upload is totally unethical.

Comcast is not my provider, so I have no direct knowledge of what it is like to deal with them and I am reluctant to base my opinion solely on MSM reports. But, if this is any indication of how they operate, I count myself lucky I'm not one of their customers.