Friendly copyright reminder

Just a friendly reminder that all images on my website and blog are copyright protected.  If you are feeling the urge to download an image from my blog at add to your Facebook or other account, please contact me first.  Most of the time, I don't have a problem with that as my website is listed in the copyright and displayed with the image.  I am considering selling "Facebook bundles" as an add-on.  Any input from anyone?