Post only smaller thumbnails, the provided hosting sites allow an auto resize to that option, or generate one for you.
Don't quote massive images. replace them by [image] or something. People can click on the quote link to go to the original post and see the actual image.
Don't post threads about what you'd like Blizzard to add to the stock UI. There is a suggestions forum over at the official forums for that.
GearScore threads are not encouraged. No good ever comes of them, please do not make them.