I am slowly working my way up the chain of command in search of someone who can make this right. Mediacom has no incentive to stop maliciously hijacking legitimate HTTP traffic unless customers demand monetary compensation in the form of account credits in response to this ongoing problem. Thus far, everyone I have dealt with has been extremely polite, but has stated that they cannot offer a credit for this issue as they believe they are still providing consistent service. My response is that they are only providing partial service in that they are selectively hijacking traffic and creating a situation in which the connection itself cannot be trusted. This sort of "man in the middle" attack is absolutely abhorrent and must be stopped.
On the plus side, the Mediacom Social Networking Team has once again provided consistent clear and polite communication regarding this issue. They are absolutely the best way to contact Mediacom if you have any sort of problem.