Google exploits it.
Google fixes it (both on their end, and in Webkit project source)
Sounds like it really was purely unintentional. It's such a short lived behavior, they can't really get anything significant out of it.
Non-issue, only newsworthy because it's mildly interesting.
Google seem to have quite a habit of unintentionally collecting and recording data about people. Very sloppy.
Why... just the other day, I tripped and fell against a girl and accidentally recorded her name, address, phone number and credit card number. Woopsie.