[AnthonyMouse]

> And as we can see, it's very difficult to write a law which only allows these "acceptable" forms of QoS.

The IP header has QoS bits. It's not hard to write a law that doesn't prohibit ISPs from honoring those bits, or even from charging customers for a given amount of bandwidth at a given level of service. As long as any service/application can tag their packets however they like, and as long as the ISP is treating all equivalently tagged packets equivalently, there is no network neutrality problem with that. And it provides a clear line.

Trying to put significantly more complicated logic than that into the middle of the network in order to try to recognize specific types of traffic is inherently defective anyway. The ISP would end up picking winners and losers based on what traffic it recognizes for prioritization. And it would inherently bias the future of the internet against innovations because new protocols would be unrecognized until they became sufficiently popular and would never become sufficiently popular if they can't be prioritized but have to compete against incumbent protocols that are.