Frostbyte the problem with your suggestion is.. once you view it, you can just go through your cache and save the pix on your HD somewhere..
As far as I know there is no true form of securing pictures once you post them online. This has to be considered when the user does said posting. If you don't want people knowing you like to crossdress, it's proally for the best to take those pictures down
It's okay.. I wont judge you.. but your boss/priest/fiancee might feel differently.