Wouldn't a black hole, no matter the size, consume the matter of planet earth as soon as it was created, talking of 1-2 seconds at best? We do not talk about a little nasty entity that takes its time to devour its prey - but a BLACK HOLE that even defeats light, a nail's head of it being potentially dense enough to include all matter of the solar system, or a mass in that range.
If such a mini blackhole turns out to be a threat, the inhabitants of planet earth probably will not even have enough time to just take note of that, but will be gone as soon as the phenomenon jumps into existence, or not!? Destroying the universe it will not - there are some really big monsters out there, and we are still there. but destroying the earth and solar system, and then growing - well, that is what black holes do, or not? I remember to have read they also seem to be involved in the birth of new stars.
Sounds like a chance for rebooting the system.
