I use a plugin that prohibits right-clicking/saving images and doesn't do any other kinds of protection. It doesn't break screen readers or mobile/responsive. I see no downside or harm from it, and it does stop the 99%. That said, for more extensive protection, I suggest using a service like a free Cloudflare account which can optionally monitor for theft of one's content. They have an app that does this. From their site: "ScrapeShield is a free app from CloudFlare that protects your site's content, and allows you to monitor and track misuse. Recommended for bloggers, media websites and any other publishers."