Just because you are paranoid doesn't mean someone isn't out to get you.
The Canadian Government openly admits they use social media as a monitoring tool. And then there's the CRA (Canada Revenue Service) who can and will use your internet browsing history against you.
I could go on, but I'm too paranoid to say any more.
PS: I hate Facebook for anything but snapshots and have not used it. If you put an image there, I would expect it to be used anywhere, by anyone. And yes, I think invasion of privacy will be the crime of the 21st century.
ETA: I was feeling punchy when I first posted, and feel I should qualify my somewhat tongue and cheek response. I think social media is an opportunity to provide increased visibility. I think anything that is offered for free or claims to be (like Facebook) has strings attached. I would use Facebook as a vehicle to promote a website that was mine - and only post images on Facebook I"m prepared to loose. There have been many articles in the paper about the infringement of privacy in Canada - and what emerges is how loose it really is. I tend to think the pages are being written as we go, and only through trial and error will we really know the impacts.
I did appreciate you posting this.