Two potential problems with that. Over time, images hosted elsewhere can go away. A giant image will change the scale of a browser, making everything else display at a reduced scale, which is annoying. If you just make sure the image you're linking isn't over say 1,200 pixels wide, not a problem. Some here don't consider that. What does it cost Pelican to host images, anyway. This website is a moneymaker for Pelican, attracting viewers to the site, anyway.
