well its not that it will drift.
you will carry the pollen.
on your hands, in your hair, on your shoes.
its microscopic with a static charge.
its almost impossible to contain.
and if your wondering how hardy a male plant is.
i was disposing of one when someone came over, so i shoved it way in the back of a cabinate behind some shit.
and forgot about it, for 3 weeks. when i found it it was bone dry with freash green growth on top, dead brown on bottom, and a surrounding ring of pollen.
once a male flowers there is no way on earth to stop it from droping pollen, even sending it back to veg wont stop the emerging pollen sacs from splitting.
and by pruning i mean such thing as cuting of one of each node set to see how it effects the opposing branch
or doing what i do pruning all but the middle 3 leaves from fan leaves, bansia type stuff.