Yup that's it, no more hot-linking of images (and CSS files as well) on this site, please. Thanks to pippo's
How can I prevent hot-linking images? post, any hot-link requests to this site will be redirected to this image below instead:
I know there have been cases of legitimate hot-linking (at least in my view they are legitimate), such as from forum threads (legitimate because I don't expect your run-of-the-mill forum member to have webspace). So this "sorry" goes to you guys. If I notice hot-linking from forum threads in the future, I'll be sure to add you to the allowed list of referrers. In fact, I've already added http://gathering.tweakers.net/forum/ and http://mozillapl.org/forum/ to the "allowed list" in my .htaccess.
I did this because there have been people who have been leeching my image files, list bullets and even my CSS(!), and I think that is bad form. If you want an image from this site, download it, and upload it on your server. So far every image and screenshot I've ever posted is available for "free" despite the Creative Commons Attribution-NonCommercial-ShareAlike 1.0 license, and should be in the future unless I turn into the Picasso of graphic design soon.