I can never really grasp the question the OP has asked. It's really simple, I have things I don't want anyone but my closest friends to know about me and some stuff that I don't want anyone to know. Can you guess what I do to prevent others from knowing about those things?
Is it really an invasion of your privacy that the people who run a website or cable company providing you network services to be able to figure out where their resources are being used? What portion of their resources are used? Did you catch that use of the word THEIR, these aren't YOUR resources being monitored so if the owner wants to monitor them, so be it. You are the one CHOOSING to use THEIR resources. When they begin monitoring the things that aren't being provided to you by them you will have a legitimate complaint about loosing your privacy.
Anyway, back to the question; How do I prevent people from knowing things about me that I do not want them to? I choose NOT to post those things online; just like in real life I don't tell everyone about these things.
PS: I watched 3 episodes of lost last night and will be viewing several sites including slashdot.
PPS: I will also share that I'll be visiting fark.com and continue not having a problem with them knowing I used some of their resources; I've also exorcised my right to give up a bit of privacy by letting you all know that though I was in no way obligated to since I will not be using any of YOUR resources in doing so.