As they will load the images from your server it would put more load on the server and if many sites put images from your site on their own you may run out of your limit of bandwidth and slow your WordPress site down as well.. If you use a lot of images and videos in your blog post you may install Lazy load plugin to lessen the page size by loading the media files only when your visitors scrolling the page.. Several additional things that we add like images plugins and custom codes will eat up many resources and if you are not optimized correctly it will end up in a slow loading website that would make your readers terminate their arrival.. I am anticipating that you have executed all the steps directed in the basic guide to improve WordPress speed such as W3 total cache plugin install and its configuration.. I would say that they are wrong as it could make their site load slowly if the site that they have hot linked is experiencing the downtime issue or it is a slow loading website..
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