"I find the most recent news of these so-called ‘supercookies’ disturbing and the fact that major websites like Hulu and MSN didn’t know they were attached to their products is just plain frightening," said Barton, a senior lawmaker on the Energy and Commerce Committee.
Microsoft's general counsel said the company took "immediate action" to disable the supercookies on MSN.com, Computerworld reports. A Hulu spokeswoman declined to comment to Computerworld.
"Supercookies are legal, but I don't think they should be," Barton said. "The constant abuse of online activity must stop. I believe the Internet business community needs to continue to investigate incidents like this and do a better job at protecting users’ privacy."