I don't post many pictures mainly because I don't think they're good enough and because I don't take the camera out - can't be bothered with the faffage!
However I have been approached before and have gladly given permission to use images as long as I get a photo credit.
There was an occasion about 20 years ago (pre digital) where a motorcycle club in Australia used, without my permission, and after I had left the country, used one of my shots as a front cover for their race program. Had I not had family in the country I would have never heard about it. I contacted the club and told them they could use the photo as long as I was credited.
This new law will undoubtedly open up a whole can of worms, and, until the situation stabilizes I won't be posting anything. I don't like the idea of websites such as farcebook controlling the IP of your personal pictures - IMO the only people who will make money out of this will be large corporations and the newspapers where journos who are too lazy to do their own work will plagurise ours!
Better to regret something you have done - than to regret something you have not done.