Google's whining because it's dominance is being threatened.
They can't copyright specific search functions, and can't feasibly, FEASIBLY putting a notice, "by using the search function, you are indeed not another search engine RIPPING US OFF..."
Besides it seems to me this would already be pretty commonplace amongst the search industry...
If 2 people have databases for the search "online games" numbering in roughly 600,000 and only half are similar, both benefit by combining them into a search with 900,000 or a million+ views, the only thing that happens is the dominant one slightly loses an edge.
Which is nothing if they both get a boost, but when your strategy RELIES on being dominant, and you can't afford to lose the edge over another company, is when you'll have problems, but cause bigger problems as this hurts the user, who will eventually go elsewhere.