not2easy - 8:39 pm on Dec 28, 2012 (gmt 0)
I thought I would come back to this topic because if you are trying to block the preview via plain image hotlinking techniques it won't really help. Bing Preview is not requesting images, they are pulling pages using the viewer's IP address and setting cookies as they go. Blocking via Bing Preview as UA might help though. They are ruining my stats and for the pages they are pulling, a lot of them have affiliate products setting a click cookie. This is evil.
I'm seeing 64 clicks set for a page that has had just 3 Bing Preview accesses showing 20 UA in my network stats for that program this morning. I can find no evidence of a human operated browser even viewing that particular page during this time period.