They're not a weapon to be controlled or even contained. They are frenzied and answer to nothing but their own hunger. If one targets you, if you even come across one, you are doomed until the lights go out and you are devoured, your skeleton being driven by an invisible swarm, saying the last thing you thought over and over
Ohhhh boy Oh Boyyy, the vasta Nerada Didn't say anything, it was the com piece, Also they can be reasoned with, as they were in the episode, They are sentient to a degree
I've always thought that black holes would make literally the best hard drives. They are the most information dense configuration known to physics, their temperatures are typically below the critical temperature of any material (can Cooper pairs form past an event horizon?), and I can't imagine anything more secure. The problem is getting the information out in a usable form, though. Surely there is a way.
So, as an update, some serious physicists seem to agree with my basic tenet that black holes would make inimitable data storage devices, and that black hole superconductivity is a very likely possibility. As such, they could store more books per volume than any other object, offer superconductive i/o signalling, quantum computing, and they most certainly make awesome weapons; QED information is a weapon.
Look.
Me.
Up.