Ozone in the high atmosphere is a good thing though - the ozone layer. It's only at ground level that it can act as a health hazard.

Definitely. Ozone is a significant irritant (although it also has an "air freshening effect", see air ionizers), to produce significant airflow I believe you'd need very large electrodes, which would produce lots of ozone. The electrodes need to be large because the voltage is limited by air's breakdown voltage, so you can't just pump up the voltage like you can (for the most part) just increase a fan's velocity.

For lack of friction/bearings a magnetic bearing fan seems like a much better option. The strength of this technology is the great exhaust velocity, which is great for space applications.

...not at the quantities this thing would make.

I'd be more worried about random Nitrogen Oxides (NOx) emissions, but again, too small of a volume to actually matter in any significant way. A couple of VWs are probably worse.