Even Original Pictures on Web Sites can be difficult depending on where they get posted. Say you sell Heavy Earthmoving Equipment and post a picture of a bit of plant to your companies FB Page. That Picture becomes the propriety of FB and technically you are unable to use it or a similar picture anywhere else without written permission from FB.
Lets say for arguments sake you want to sell that bit of plant on a Auction site like E Bay could FB report E Bay to the Authorities and get E Bay taken down? Not to mention you would naturally have a picture of that bit of plant on your Companies Web Site and most likely the same picture as it's the best you've taken so FB could also have your site taken down as well for displaying/using their propriety.
Even if it's a different picture it could be claimed that as you posted a picture of that bit of plant on FB, FB owns the rights to everything related to that bit of Equipment so you are unable to use any other pictures of it anywhere.
Or you employ an Advertising Agency to come up with a series of adds for your Business and you use some of the Images developed on your FB Page, who then owns the Images?
The Agency who made them or FB?
The agency made them for your company to sell something and with the expectation that you would use whatever they made so could they complain that you used them and others think that they now own them?
Then there are company Logo's who owns the Company Logo's that are used on the Companies FB Page?
Probably more importantly who wants to fight a court case over something like that?
What I really find amusing is that those who originally benefited from Piracy are now so strongly complaining about it and how it is perceived to be adversely affecting them. Just goes to show that places Like Hollywood can never be trusted to do anything at all that can be considered as right for anyone but them.
Col
