Ok back to the topic of Traffic Management.
The Uk has recently hinted at legislation to force ISP's to monitor the usage by their customers and Ban people from the internet for downloading piracted items.
The ISP's are saying that there are many legal as well as technical barriers to this and strongly impose any role other than "mere conduits".
http://news.bbc.co.uk/1/hi/technology/7246403.stm
I can't see this position changing.
Most ISP's have some sort of traffic management programme that throttles the speed of torrent files etc, but encrypting the file and other measures ensure the downloaders are usually one step ahead of the ISP's.