I do hear ya' and I agree with you, but plug'ins seems to be the only place to post stuff like backgrounds and transparent 'png's that are zipped...... it's either post them there or post them one at a time in art and clutter the place up even more with single images.....
It would be great if there was a 'resources' part of the site to put them in (that would hopefully stop all the transparent .png's getting posted in textures too).