If your livelihood depends on your images not being available for free, then you need to use image protect software and/or website protection software. For example if you are selling art or image stock and displaying a small example of the image, it needs to be copy protected because even a small example can be screen shot and used online in blogs or even printed and sold as art.


With all the blogging going on just to create backlinks to web sites for SEO ranking, those spammers will not be buying image stock so they are not going to pay you for your image. Instead they are going to download it or take a screen shot and use it for free. So you need to copy protect the samples in your uncatalogued and you need to use real copy protection, not those silly "content protection" plugins available for WordPress because they are useless. All they can do is annoy the visitor by removing the right click options from the mouse menu. They will not prevent anyone from downloading the whole page with all images neatly packed in a folder, nor will they prevent use of the Print Screen button or prevent screen capture software.


Until you can prevent all methods of copy and image theft, you might as well not bother trying to protect your content with methods that even your grandmother knows how to exploit in this day and age. Right-click disabling was developed more than 20 years ago and very soon after deemed fool-fodder because the Print Screen button can be found on almost very keyboard.  But good copy protection is not available for mobile phone users? No, it isn't and for good reason because real copy protection cannot be secure on amusement devices like mobile phones that are limited to simple apps based on JavaScript and HTML. If you are selling image stock to professional designers and companies, you need to realize than any and all professional offices should have a Windows PC regardless of what other flavor that they might use for their general workstations and self gratification. And that is all that you need to cater for. So do yourself a favor and use image protect software that will properly secure your livelihood and protect your images. 
ArtistScope provide the most secure and most robust image protection and website protection software. In fact they are the only providers of any truly effective copy protection solution that can be used on web pages because they back up their software and solutions with a web browser that can support them, whereas all other browser makers fall short of the mark by only supporting simple apps designed for mobile phones.