the smallest statice electric spark is around 500 volts,,,3000 is really nothing if there is minimal amount of power flowing through it,,,the only way to get a good shock off the system is if you touch both ends at the same time,, then you're just being an idiot
as for making heatsink bigger,,this is for a laptop, ppl are trying to make them smaller, not heavier
I agree the ozone part may be an issue,,but who knows how much is actually generated, it may take days in a completely sealed room to have enough to cause a problem.