Personally, I think even without Internet Explorer ruining Do-Not-Track (which I also think Microsoft torpedoed on purpose by making it the default), the tracki

Personally, I think even without Internet Explorer ruining Do-Not-Track (which I also think Microsoft torpedoed on purpose by making it the default), the tracking companies wouldn't have respected it. They were looking for an excuse not to comply with DNT after promising Congress they would self-regulate, and IE gave them a fig-leaf to go back on their word.