The earth is routinely hit with very high energy cosmic rays, beyond what even the LHC can generate.
We’ve lasted 4 billion years under that bombardment. LHC isn’t going to be able to generate anything any more dangerous.
And the other thing is that black holes gradually decay, as Stephen Hawking showed. The smaller they evaporate.
Good discussion
http://en.wikipedia.org/wiki/Hawking_radiation
The evaporation time is proportional to the Mass^3
A black hole the weight of a car
would only take a nanosecond to evaporate
a black hole of mass 1 TeV/c2 would take
less than 10^-88 seconds to evaporate completely.
This is profoundly less time than it takes for a
light particle to cross a proton (Planck's length), or 5x10^-44 sec
I do not think you have anything to worry about...