Right, been lurking for a while now, and I figured, maybe I could post a bigger version of post #1146676. I don't really know if this'll pass or not, but in case it does, source is 'wrong', by which I mean the file where I found it (http://exhentai.org/fullimg.php?gid=614730&page=109&key=d9ca0188d3) reads 2102 x 3031, but they keep it behing a cookie manipulation which I don't think danbooru would like, and howto:upload explicitly reads "Never download an image to your computer and upload that copy unless you absolutely have to. Note that the source for an image should always be a link to the image itself, not the page it came from.".
So if anyone who knows better passes through, hypothetically, should I upload the files rather than link to that?