Amazing how little is known about lightning, as demonstrated here in this thread.
A careful reading of Ben Franklins famous experiment showed that lightning was electricity- and without a lightning bolt!
He used the charging of the atmosphere to collect energy to charge his Leyden Jar- a crude battery/capacitor.
No reason this method couldn't be done on a large scale.
In a strike: Mention is made here in this thread of the need for a resistor: not so, a charging coil (reluctance) could be used to limit the surge of the high amount of electricity. Such a coil could also have the added advantage of acting like a transformer- transforming high voltage/low amperes to low voltage/high amperes. It has the advantage of eliminating the need for a variable capacitor.
So sure, these things would have to be huge, but not the size of the "State of Montana"!
The TV Discovery Channel had several programs showing lightning and it's effects. They used rockets trailing wires to channel the lightning to a target. This could be done as a form of control. A ionized path created by a laser might also work.
To my mind, there are several possibilities of obtaining electricity other than the crude means we now use to make it. One is a way to tap the ionosphere- it contains a tremendous "Difference of Potential" as a result of solar cosmic activity.
Could it be tapped with a ionized path?
I was wondering how difficult it would be to attract lightening and how often lightening would strike a specific area were something like that was built. Also wouldn't that be dangerious?