Anyway, Google Image search doesn't work for all the pictures. And still some post show us there's a way to do it!. Black Hole let us know it for sure!!. There are plenty post unsolve.
There shouldn't be soon, once everyone gets the hang of it...
This only works if the pictures are used which are already cataloged elsewhere on the 'net.
FWIW, I tried a couple of things with some new puzzles, that seem effective in combating this evil tool. If possible, take a crop from a larger photo, and rotate it by some degrees. Also, making colour pictures B&W, or changing the tint of B&W pictures, seems to work quite well. It's easy to check with the very same evil Google tool, if your modifications have proven effective. I mixed in a few un-retouched photos to make sure I knew who is being naughty, and who is being nice.
The results are quite telling.
Since we've now had another member come clean, I hope we can come to an agreement about if, when and how to allow or disallow the use of this tool.
I am working on a small set of tutorials for the "news" section. One will be some general, easy-to-do (and free) things that make pictures insusceptible to Google's image search.
Stay tuned.