I also liked their rationale for Chrome's "incognito mode": "For times when you want to browse in stealth mode, for example, to plan surprises like gifts or birthdays, Google Chrome offers the incognito browsing mode."
Google enables our vices without actually identifying them. :)
I actually did use Chrome's incognito mode to buy a birthday gift the other day. On the other hand, the gift was a vibrator. Not sure which side this ends up supporting.
(Regular YCer here, just don't need this linked to my actual name)