The first one I tried just showed the picture by itself but I now see there are usually links to the original page.
I was a little disturbed to find a picture I used in a tutorial article of my daughter, Lara, had been pinned onto someone's board called 'family'... but it seemed harmless enough as there were dozens of photos of different people and children.
Thanks for following, Pat - I have done the same
If anyone else is interested you can find me on Pinterest here:
http://pinterest.com/ianburley/
Ian