Google and Apple weasling out of "Do not track"

An anonymous reader writes: Per an op-ed in today's New York Times, Google, Apple, and others would be effectively exempt from "Do not track":

[T]he rules would allow the largest Internet giants to continue scooping up data about users on their own sites and on other sites that include their plug-ins, such as Facebook’s “Like” button or an embedded YouTube video. This giant loophole would make “Do Not Track” meaningless.