Peter Norvig is at least in principle aware of some of the issues; see e.g. this article about the current edition of Norvig&Russell's AIAMA (which mentions a few distinct way in which AI could have very bad consequences and cites Yudkowsky and Omohundro).
I don't know what Google's attitude is to these things, but if it's bad then either they aren't listening to Peter Norvig or they have what they think are strong counterarguments, and in either case an outsider having a polite word is unlikely to make a big difference.
Peter Norving was a resident at Hacker School while I was there, and we had a brief discussion about existential risks from AI. He basically told me that he predicts AI won't surpass humans in intelligence by so much that we won't be able to coerce it into not ruining everything. It was pretty surprising, if that is what he actually believes.
So I know we've already seen them buying a bunch of ML and robotics companies, but now they're purchasing Shane Legg's AGI startup. This is after they've acquired Boston Dynamics, several smaller robotics and ML firms, and started their own life-extension firm.
Is it just me, or are they trying to make Accelerando or something closely related actually happen? Given that they're buying up real experts and not just "AI is inevitable" prediction geeks (who shall remain politely unnamed out of respect for their real, original expertise in machine learning), has someone had a polite word with them about not killing all humans by sheer accident?