tangor - 6:03 am on Jan 15, 2011 (gmt 0)
I've denied G access to my images for several years. Makes no difference... they keep showing them (hotlinked from their results page). And I can't get them to quit.
Well, not precisely true. I experimented over a 4 week period of robots.txt and .htaccess deny/disallow for big g... and finally had some silence. Also lost near 65% incoming. These days I stick to:
...for Google and use .htaccess to 404 google-image
Image theft (I see things differently than most) is now less than 2%. No loss in ordinary traffic, so that works for me!