If it doesn't evaporate, it would (slowly at first) absorb the Earth. We might not get pulled in anytime soon, but it would sort of be a bummer for the future if the planet was destroyed in the next few thousand years.
(I don't think I have an interesting opinion when it comes to the question of whether such a hole would evaporate or not, but the question of why having a blackhole on the surface of the planet is bad is easier to think about)
Couldn't it be "contained" (it would break out eventually, as it would slowly suck in the container, but it could at least be contained for a period of time) and launched on a solar escape trajectory? Very, very expensive, but better than destroying the Earth in a few thousand years.
I guess it would pretty much be impossible to detect.
The article ufmace links in a sibling thread addresses the issue more directly, it wouldn't grow fast enough to be something to worry about, thousands of years is the wrong time scale.
(I don't think I have an interesting opinion when it comes to the question of whether such a hole would evaporate or not, but the question of why having a blackhole on the surface of the planet is bad is easier to think about)