Slightly different example but sort of similar result, e.g. your home is sort of in public domain as well, and anyone can find it if they want too. But that doesn't mean they have the right to enter your home, right?
I think Google has been trying to expand everywhere without giving due consideration to some of its actions. Beside when a corporation gets this big, things can get bit messy. I strongly believe that no corporation should be allowed to become so powerful that it can dictate things at its own will. IMO Google is a monopoly and should dealt with accordingly.