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I posted a few days ago how it was possible to tell FB to fetch specific images in my site for status updates.

I still need to tell it what not to fetch, since many of these pictures wouldn't represent the website very well. I'd really rather only show the site logo.

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Great question! I often see when a site is shared that Facebook picks a banner ad as its image even though they come from a completely different domain! I'd imagine this would be very common and easy for them to avoid but the next best thing would be to find the answer to your question :) – Itai Mar 3 at 21:26
If you use the og:url tag, you can specify which image is default, but the others will still show up as choices. I'm not sure of a way to exclude images, unless you make them background images. – Dallas Mar 27 at 4:59

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One solution would be to cloak your page when the facebook scraper comes along. It uses the user agent.

facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)

For that user agent, serve a version of the page with the images removed.

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