LOL i love what i started here! I sure as hell wouldnt draw smoke thru my PC nor would i even think this thing would be a good idea even if you had a metal drive bay cover to mount it in because all its gonna do is heat up your system.
If you got a strong PS and and empty METAL external drive bay (like a box) and mount it on top of your PC that might be an idea , Cut out the back of the box and put your ash tray there!:D