Set wrote:No, I'm not worried.
A black hole won't suck in everything in the universe. You have to be within a certain distance of it for it to pull. If you're not in the field of gravity you're fine. Even if there are mini black holes created by this thing, the field will be so small as to not even tug on your hair if you're within three feet of the thing.
Think of space as a flat plane, and a black hole as a dent in that plane. You won't fall into the hole unless you're close enough to slide down the edge of the dent.
Set, a black hole created out of this machine would not swallow up the whole universe, that is physically impossible, yet a black hole can pull things twards it from farther distances away. Take for example the black hole that is at the center of our, and hypothesized to be one at the middle of all the galxies. How else would one stay together and continue spiraling without some supermassive gravitational force pulling everything twards it? Back to this story though, A small black hole could very easily destroy the whole planet. Since one of this size might be stable enough to not dissipate, (many microscopic black holes have been made in labs, but these evaporate due to the amount of mass not being enough to sustain it) it would be pulled twards the earth collecting all the matter that passes throught its event horizon as it fell through, and continue falling through the plannet then being pulled back until it had enough matter to hold it in place at the center of the Earth where it would slowly pull the planet into it self.
Also when dealing with black holes, you cannot think of space as a 1 dimentional plane because the beauty of black holes is that they affect all 4 (known) planes of space, Hight, Width, Length, and Space time.