Do Not Track should mean what users think it does: that data, by and large, will not be collected.
61 percent of people expect that clicking a Do Not Track button should shut off *all* data collection. Only 7 percent of people expected that websites could collect the same data before and after clicking a ‘Do Not Track’ button. That is to say, 93 percent of people do not understand the [advertising] industry’s definition of [Do Not Track].
Source: The Advertising Industry’s Definition of ‘Do Not Track’ Doesn’t Make Sense – The Atlantic