I'm the "head fred" networking/infrastructure guy at an ISP. I want to
avoid, as much as possible, peeking at my customer's traffic.
In my personal opinion, an ISP should be a dumb pipe. I'm providing you with the ability to send/receive "n" bits per second; I don't care whether you use it to participate in e-mail discussions with your church group or stream pornography and play online poker.
Are you certain you want ISPs to be responsible for monitoring all of your traffic and what you're doing online? Do you really want somebody else deciding -- at their own discretion -- what is "acceptable" for you to do online?
I'm very pro-privacy, pro-encryption, "pro-Internet freedom", etc., but the next guy may not be.