A given
But you can never get the genie back into the bottle. These things have a way of making into the other side's hands.
Stinger missiles in the 80's? Once they're out there, it's pretty hard to guarantee they stay where you want them.
Another thought regarding Zero's private "army". Like the Brownshirts they will be poorly educated cowardly thugs, bullies and sadists. They will be better equipped, but see what happens when the hunted start shooting back from the rooftops, etc.