When some random site throws my pages into an iframe, at least the user sees what I've served, and I at least have some control -- I can break out of it with Javascript, or I could even serve completely different content.

It's a bit different though when the biggest fucking site on the internet joins in.

Why should I be forced to expend bandwidth every time Google decides a page on my server is relevant to a search result? This could double or even triple my bandwidth costs.