You might be okay, but I would try to get some insider info on how AdWords Analytics companies get away with it. Might just be sneaky bots. A lot of idiots write code that pings or loads google.com to check for internet access so they can't block it completely.

I redundantly made the following comment upon referring to this comment later in this thread:

Try Google Custom Search as well, $100 a year for 20k queries; I'm a client.