There may be nothing wrong intrinsically with controlling content and infrastructure, but it seems to be bad for consumers generally, as exhibited by Comcast[0]. And while a high-speed competitor to local cable monopolies is exciting, I worry about trading one dictator for another just because there's some competition in the transition period from the old guard to the new.
Is there some safeguard in place Kansas City and other fiber recipients have arranged to prevent Google from having the power to exert cable-esque control? Not rhetorical, genuinely curious.
EDIT: I'd like to make it clear that I'm not anti-Google, I don't think they're evil, or abuse consumer data, or are actively trying to become the next Comcast. I am, however, expressing concern over the position of power they will find themselves in if Fiber takes off. So far I've seen a lot of comments suggesting Google is not evil, to which I agree, but I haven't seen any indicating that there are adequate checks in place to (relatively easily) prevent the abuse of power.
[0]http://scrawford.net/blog/comcastnbcu-will-raise-costs-for-c...