lucy24 - 10:08 am on Mar 30, 2012 (gmt 0)
Urk. If google's IP has been compromised, nobody is safe. They go everywhere. That's the whole point of being google.
Another off-the-top-of-my-head conjecture: G### is sneaking around in plain clothes, emulating a human, to see whether humans really get what the googlebot thinks they're getting.