Most of the people who use
privoxy will se a white/grey picture instead of the picture privoxy blocked on the website. This is not really better than original images i think.
Abe said that he uses 1x1 pixel images instead of these white/grey picture.
And its really pretty easy to achieve this, just add to your user.action file the followinig setting:
+set-image-blocker{http://nion.modprobe.de/trans.gif}
trans.gif is a transparent 1x1 pixel gif file and voila you will see nothing at the place of blocked images.