Facebook has responded to the debacle over the weekend with regards to the company installing cookies that persist on a users computer after they log out, Jennifer Valentino-DeVries has the story:

“The onus is on us is to take all the data and scrub it,” said Arturo Bejar, a Facebook director of engineering. “What really matters is what we say as a company and back it up.”

Facebook claims the data they keep is for security and ease of logging back in, after a user has logged out. I don’t doubt that this is true, but such a thing does not make this a ‘best practice’ where, nor instill trust.