I guess I'll never use Facebook
Well, it turns out it's worse than trouble... it's run by a bunch of thieves.
Turns out the ToS gives them absolute rights, now, and in perpetuity to any images which ever so much as rest for a moment on one of their servers.
Rights grabs aren't new. Anytime I consider entering a contest I read the rules; because a lot of them make some fairly demands for usage rights. National Geographic makes a complete claim to use your work, make derivative use of it, in perpetuity, an in any medium now, or yet to be. So no National Geographic contests for me. Yes, I get to keep my copyright, but they get it too, and they get to use it forever, and not a penny to me; barring the longish shot (just based on numbers) that I win.
And if I win, you can bet they'll use it.
Back to Facebook.
When you post User Content to the Site, you authorize and direct us to make such copies thereof as we deem necessary in order to facilitate the posting and storage of the User Content on the Site. By posting User Content to any part of the Site, you automatically grant, and you represent and warrant that you have the right to grant, to the Company an irrevocable, perpetual, non-exclusive, transferable, fully paid, worldwide license (with the right to sublicense) to use, copy, publicly perform, publicly display, reformat, translate, excerpt (in whole or in part) and distribute such User Content for any purpose, commercial, advertising, or otherwise, on or in connection with the Site or the promotion thereof, to prepare derivative works of, or incorporate into other works, such User Content, and to grant and authorize sublicenses of the foregoing. You may remove your User Content from the Site at any time. If you choose to remove your User Content, the license granted above will automatically expire, however you acknowledge that the Company may retain archived copies of your User Content. Facebook does not assert any ownership over your User Content; rather, as between us and you, subject to the rights granted to us in these Terms, you retain full ownership of all of your User Content and any intellectual property rights or other proprietary rights associated with your User Content.
It gets better. If you use an RSS feed to post to Facebook... it gets hosted on the Facebook servers. Facebook reads the feed, and then duplicates the source material on it's servers.