Blade... Okay, forgive me, cause I'm a little intox'd... but saying that adding passive heatsinks is a bad idea or a disfavorable one doesn't seem to follow much logic at all to me? Adding ANY sort of extra cooling to components does WORLDS of difference for them (FACT.) And as far as the radiant heat that the heat sink distributes to them is null, for the simple reason that, IF you leave component "A" non cooled, where does that heat go? It get's TRANSFERED to the mobo and the other surrounding components on the board (a lot etc...). So, by adding a passive heatsink (etc.) you are providing a heat outlet for not ONLY the primary object to be cooled, BUT it also relieves an AREA (be it small, but on a crowded mobo small is relative) of transfered heat... based on the fact that the primary object to be cooled is NO longer dumping it's extra heat load back to the mobo PCB, which other components have to share and absorb. Each surface mounted object on the mobo acts as some sort of small heat outlet... by significantly cooling ONE specific component, you are actually contributing to cooling a small lalent heat area of other objects, as with the fact that now there is 1 less heat inducing factor in the small footprint (heat) area, therefore ANY sort of cooling helps, there 's no way that by adding a heatsink to comp A- makes Comp-B worse off, unless it now has to handle more heat load brought on by the radiant heat form the heat sink, okay this is sounding like a repeat....
Either way, even with that extra heat now being distributed by the heatsink, it's still MUCH less that if you didn't have it at all and the mobo was saturated with a bunch of IC's giving off heat and for it (heat) nowhere to go, but reside around the components... I hope this is making sense... haha Good night all!
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