They don't just want to use QoS, they actively do. All non-Comcast TV traffic entering a Comcast customer's network is tagged with DSCP 8, which basically mean

They don't just want to use QoS, they actively do. All non-Comcast TV traffic entering a Comcast customer's network is tagged with DSCP 8, which basically means "bottom feeder" in terms of network priority (below even untagged traffic). For many this is not a problem. But if you have a router with WMM (WiFi QoS) enabled, the above setting destroys your connection quality, since inbound data takes a back seat to basically anything on the airwaves. I had to start stripping DSCP off of incoming packets to regain any semblance of a functioning internet connection. And of course Comcast doesn't care about this, it combined with their bufferbloat problems just serve as a means to convince subscribers that the really need to upgrade to some $100/mo package to be able to browse Facebook…