You can place a little square with your face in the down right or left corner of the image. I'm shure that nobody will be able to convince other people that this is not your face showing at the pic.
You can put your face also in the middle of the pic, so surfers will be able to recognize you when they see you walking on the street. I tried this some years ago, and my neighbour told me that my face was showing on a porn site, so the method works
