Its a basic rule of thumb, if it aint out there then its not going to be take...
The purpose of the internet is to properly set up your web pages so that the content you offer is too low grade for others to use but good for your site's look, etc.
As for images, I generally take an image, crop it to what I want in actual size, so if its a 500 x 800 pixel and I only need a 200 x 300 pixel image, I crop it to that size, then I will further reduce the image data by lowering the DPI to minimum of 72 dpi so images look good but you can't upscale, then compress the images by saving them as jpg files with a compression level of not less than 79.
The result is a very small image file.
Then.. To stop simple copy and paste, use a double glazing method, that is using a transparent PNG file that is then displayed on top of an image to stop right clicking.
You can do this in CSS, use an empty place holder where your image is to appear in the page, use CSS to set that image, z-index it to be below a transparent window.
So not if someone wants to save your image, they have to go in to your site code and find its path reference. Simply right clicking and saving will result in a transparent image!