I've been thinking for a while that this topic needs its own thread so we can get some broader, focused input and differing points of view on the subject.
Some comments are surfacing in other threads that I feel are part and parcel of a contentious issue for most site owners.... Google's obvious intention to draw from the work performed by others, however and whenever they choose. Knowledge Graph is a case in point.
You may own your content now, but who profits from that labor in the future may be a different story.
I suspect that comment goes to the heart of the issue for many people. I understand the concept of "fair use" (I assume most countries have similar, but differing, laws on this) but the idea that one party can take, repurpose and profit from the endeavours and intellectual property of another, with total impunity, does not fit within my concept of "fair use". Is this really how the law actually works in your country?
if your business model depends [on] click-throughs to retrieve publicly available information, I would rethink the business model.
I understand the point... but if the information becomes publicly available (on the internet) because my time, expertise and funding put it there, then surely another party does not have the right to appropriate the information for its own purposes?
Google can only regurgitate data from its index (ie internet data). It does not have access to every fact or bit of information that exists in the public domain. It learns new facts/information only when someone publishes it.
When that new information surfaces, why should it automatically become Google's to use at the possible expense of the poor sod who did all the work in creating it?