You shouldn't mock, hdd's WILL get hot, (depending on type, ambient, and airflow), especially if you have no fan's in the entire system. I currently have just one fan in the PSU, (which is usually running at 5v). The HDD's get very warm when they have been in use for a while. Yes just an 80mm fan at 5v will move the stagnant hot air around them and cool sufficiently, but if like me you are after silence, and other items are already water-cooled in your PC why not the HDD's? I'm making my own but you can find one for purchase here, (and if asked I'm sure he could make a special type for you if required).
<b><A HREF="http://www.angelfire.com/ms/codemasters/store/harddrive_blocks/index.html" target="_new">Superior Cooling Technologies</A></b>
<i><b><A HREF="http://www.dwpg.com/stealth/1/" target="_new">Stealth Cooling Project</A></b></i>