LOL! - Got some problems with our communications somewhere!360kv is way better then 5mil! If im wrong and your right i would not mind being wrong this time!
5mil.. do you mean 5mV? - yep, 360kV is a lot 'better' than 5mV (unless you are touching a conductor - in which case I would prefer 5mV!)
The bottom line to all this is that the earth / ionosphere can be seen as a circuit - the voltages and impedences of this circuit are (quite) well known and understood.. And even if one was able to 'take' all the current from the ionosphere (without causing catastrophic disruption to the electrosphere) there would not be sufficient energy to power even a small city.
Electrical storms are a different matter - these are mainly the product of thermal energy which bombards the earth continuously (causing the weather patterns - particularly evaporation and wind - which is thermal energy converted to another form), and, in fact, it is these storms which 'charge' the ionosphere and 'top up' the charge.. otherwise (even with the high impedences) the 'capacitor' would have discharged a long time ago.
One of the things which is not (as far as I am aware) understood is what mechanism maintains the ionosphere at a reasonably constant potential.. (perhaps this is what the UFO's are doing...?? LOL)
http://www.nap.edu/openbook.php?record_id=898&page=211 has a breakdown of major components of earths electrical circuit (this book is well worth reading - I only discovered it recently + wish I had found it sooner - would have saved me a lot of time!)
I dont care who is 'right' or 'wrong' - Looking at those UFO pictures on the 'tether' video makes me wonder if I actually know anything.. Nothing seems to make any sense anymore...