This may actually belong in the DVD section but it is a rant so here goes.
Why did Pioneer stick vents in both the front and the back of the their 107d drives? They basically turned it into a windtunnel sucking in dust and as we all know dust is not a good thing for optical drives. In fact, if you search around you can find people who's drives have stopped working right due to dust build up. It's a really stupid design decision that they seem to have partly corrected with their new models. Nec and LG have it right, no vents at all since on modern drives they shouldn't be needed. Nec even advertises their anti-dust seal or something like that.