Because then you could at least see the URL you're going to instead of the redirect the site is going to use to track you anyway. This attribute doesn't do any

Because then you could at least see the URL you're going to instead of the redirect the site is going to use to track you anyway. This attribute doesn't do anything shady, and would do the opposite if it were actually used. The whole idea is to be able to provide the tracking data the site will get one way or the other, but with the ping attribute, you can do it without mangling the URLs.