Comment Re:On no (Score 1) 110
The only power that Do Not Track is as a means of making it clear that a user has a particular desire not to be tracked. An advertiser can chose to respect this choice, and will do so if a minority of motivated and technically inclined users make their desire clear - they don't lose out on much information, and they get substantial goodwill for it.
If Do Not Track is the default, it is no different than not having the bit at all - it's just a useless header that has no meaning. If an advertiser has a stance on tracking, they're not suddenly going to change it because browser vendors have stated they don't intend for their users to be tracked.