Chalk up another victory for corporate surveillance: Five years after advocates came up with an easy way to let you browse the Web with just a little privacy, the Do Not Track system is in tatters and that pair of boots you looked at online last month is still stalking you from website to website. In 2009, a few Internet privacy advocates developed an idea that was supposed to give people a way to tell websites they don't want to be monitored as they move from website to website. The mechanism, which would eventually be built into all the major browsers, was called Do Not Track.