My friend shared this bit of info with me, and I thought I would pass it on.
I would like to point out what a commenter said because I think it is more of what is going on with this: The general message here - read Terms of Services of the sites that you patronage, is really good. But I also see some misunderstandings and misinterpretations of what it means to a) grant license to a company and b) grant permission (either of these things do not confer exclusive rights, and you will find similarly worded Terms and Conditions on DeviantArt, Google+, Photobucket, Flickr, and all the other gargantuan sites), Creative Commons licensing and finally - *why* sites this big need to word their ToC like this, which has more to do with the nature of the site than any nefarious intentions to actually make a profit off artwork.
Generally, the only permission you're giving them is for the art you put up on the website, which is almost always low res work. And usually the only thing they use the 'permission' for is to legally be able to show your icons or artwork on other people's news-lists/feeds/follower pages without getting sued for it. I mean, they don't have your permission to do that, but if you're friended to someone, any publically uploaded picture (or friends-only) can show up in other's feeds. That's an illegal offense if they don't actually cover themselves with legal speak saying 'you grant us permission to distribute your artwork,' which they need if they want to show your photos/art to everyone you know and friends of friends.
Facebook have always been pretty good with me. *Particularly* my art and my fanpage. For example, they promptly removed artwork posted on another person's site when it was posted without credit or permission; and they sent a warning to that person to cease and desist.
If the ToS/ToC changes in a way that makes me uncomfortable, I'll deal with it then, but the reality of what the statement is intended to cover is often vastly misinterpreted by artists. When in doubt, get a lawyer to help you; there are often free lawyers, or free legal advice offered through art organisations, and they can be invaluable for this kind of stuff. And second, don't rule out Facebook as an option for art promotion until you've spoken to a lawyer; remember - granting someone permission, or licensing permission is not the same as granting full rights, ownership of artwork, and a great deal more.
Now if I post my artwork, I always put a lower res image with my KB Logo on it, so that is the only one that they have a right to distribute (if they even want to) and that gets my name and logo out anyway.
I used to post all mine on Facebook I even made a special Facebook account just for my photography to keep it separate from my personal one. But once I started reading all this I stopped posting any new art. It is really sad that you can't post your work and know that someone else isn't going to try to take credit for it.