VoIP is content. SMTP/POP/HTML email is content. Do you want your ISP to monitor those to decide which are okay?

Discriminating against torrent traffic can be like racial profiling. A protocol is not an intent.

If you do want profiling, perhaps consumers running Windows should pay a higher fees and be given less bandwidth since those customers have higher support costs and have the machines most used for DDOS attacks, sending spam/scam and other foul behavior.

Windows machines harm the network. If a customer wishes to configure his router to share the bandwidth he's paid for, that's not theft of service. (Also read the F.C.C. notices included with U.S. routers - they don't own spectrum)