> Which means that tech and ad companies who say they comply with Do Not Track could simply ignore the flag set by IE 10 and track those who use that browser, w

> Which means that tech and ad companies who say they comply with Do Not Track could simply ignore the flag set by IE 10 and track those who use that browser, which means Microsoft has no choice but to change the setting. That's a reach. How would the ad companies know if the user manually turned it on or off? Ars is claiming they'll completely ignore any DNT from IE?