There are ways to hinder attempts to save the images... but If your browser can see them, then your computer has it, and you're in control (take a screenshot if you need to)
I use the Opera browser and it let's me save an entire page including all pictures. Including any that don't want saved. I haven't had a problem with it yet, but I'm not a frequent picture-saver either... Maybe you should try it.
See
www.opera.com
As a side note: do respect other peoples privacy and copyrights. If you do that then go ahead.