Image Theft Protection for Adonis Pro

I wanted to know if there is any way to increase the security of this theme when it comes to image theft protection. Right now, the images on posts are as easy to steal as a right click and save action, and in full size, too. I've been watermarking my images since using this theme, but want to know if there are further steps I can take, to increase the difficulty, at least, when it comes to image theft. Thanks! Reid