AC @ Phorm
My data should be going nowhere near your profiler. That is the crux of the problem. If I opt out, my data is still being sent to the profiler. There is no point in this. I don't want this to happen. It's my data. I don't want it profiled.
Although the ISP can check what data is being sent to Phorm, unless it checks Phorm's codes with a fine tooth comb, the data could contain absolutely anything that Phorm wanted to send and there would be virtually no way for the ISP of finding out. Just because the profiler is mounted in the ISP doesn't mean that people want to be profiled.
Also, for the profiler to know if I have opted out or not, it obviously has to interact with the browser. Therefore, it is going to take longer to get any specific page because my browser has to talk to your profiler before it can actually talk to anything else.
It seems to me that if BT want to incorporate this "service", they are going to be forced into doing what Talk Talk says it's going to do with Phorm. If they do not, I will be leaving as well as many others.