Page is a not externally linkable
thecoalman - 6:16 am on Jun 5, 2009 (gmt 0)
Many of them never use the size attribute for the image so it breaks the layouts on a lot of pages, the hotlinker has no clue since they have the imaged cached locally. Once the cached image expires assuming they don't notice the missing image the page is now broken with no visible reason why... LOL.
My personal favorite is a 1px X 32000px transparent .gif.