I think we shouldn't block Googlebot now. First we have to fight and discuss. In Germany we did some trouble in our blogs and the first big news-sites began to think and write about it.
I argue this way: imagine Google announces an update in the websearch. When you click on a search-result a layer opens and you can read the whole article on the google result page. At the end of the article you can find a link to the source. Of course this is really user-friendly. You have not to wait for loading the source-page, perhaps with spammy ads in a waste layout.
This is exactly what Google now does with images. Stealing content and declare it as "user-friendly".
There was an unwritten agreement between Google and the image-owners: we gave the content to make Google's image search great - and Google gives us back the visitors. But now Google has brocken this agreement - they want it all. We, creatives, photographers, artist and so on, we just want to welcome the visitors on our pages, with the images embedded in our design, with the option to motivate users to have a look on our other works - because it's our content what people can find on Google. It's our option to say if we want to monetize these images or not.
It is a dramatic change in whats Google's goal. They are not longer a "search engine" - Google became a "find engine". Weather, Flight, Shopping, Knowledge graph and now image-search; Google tries to include as many contents as they could. It's our job to tell the people: stop, this is our content! Google is a search-engine, not a "content-engine"!
I hope many of us go out and tell it to other people. Because we are right!
Good luck, Martin
[edited by: mssfldt at 11:32 pm (utc) on Jan 28, 2013]