[Domino]

I thought about responding to your second post, but I found the necessity to be demoralizing.

Clearly, a two-proton black hole isn't going to have much effect, and may evaporate quickly. However, it is foolish to assume that those will be the only two protons around. If the black hole bumps another proton, it is 50% bigger, stronger, and ready for its next meal.

The black hole, when created, would be far smaller than a proton, and so, very probably, will simply evaporate, even if there are more meals around, because it's too small and weak to find them. It could fall straight to the Earth's core, and never bump another bit of matter, if it lasts that long. However, it is very much like a snowball, rolling down a hill: once it does start collecting matter, it will become more able to collect. Every proton it consumes makes it that much more able to find and consume protons, until it grows large enough to gobble up molecules... and, at that point, it won't be evaporating any time soon, so it's odds of finding more fodder grow much higher, making it a near certainty that, eventually, it will consume the whole Earth.

So, while even creating a black hole might not be terribly dangerous, the possibility of calamity remains.

Of course, since the folks running the thing are utterly certain that no black hole will be created, they've made no preparations to contain the thing. At that small size, it would be very easy to control it... if they're at all ready for it.