Exactly, especially given that most gpu,s sit with the fan facing downwards.
I wish they would put a cover on the back of gpu,s too[i know some have] as its exposed circuitry and those tiny resistors etc are prone to damage with only slight force id imagine.
In fact a fan/heatsink could be built into the cover somehow?
I had an idea of using a 12 volt car fridge, you know those small eskies for cars, pulll the freezer components out and wire it into you computer hehe, man i love technology, and design, love knowing how things work, love industrial design too.