For me personally, sharing shouldn't be frictionless (which Facebook have started using as a synonym for 'involuntary'). Sharing should be a conscious decision. I do understand how this is beneficial to both Facebook and Fandalism, and although I don't agree with the concept, it looks like you've built a really great product, and you deserve a good bit of exposure and success. I'll certainly be evaluating it for a while. Great work, sir.