this idea have been written on gfy years ago, i dont understand why its not working already ... but, its good for smaller sites, for big sites it will be problem to watermark every image on time if there will be hundreds of people online ...
and sure, do not put the info into the image, but into the image code, thiefs are not that dumb, they will blur the info or something and you are lost again, if you include it into the code well and they remove it the image will be broken and useless ... have luck
