Someone with a copy of your fingerprints can prove that they are you. Are there no crooked cops in this world?
There was a recent case of a misread print, but I believe it was due to protocol differences and copy reproduction problems. It could also be that the print was indeed correct and the investigation halted for other reasons.
Our judicial system make errors all the time, but forensics are getting better everyday.
I can think of nothing that cannot be used in a wrong way if someone wants too.
I just think, that in a age of DNA and forensics, coupled with stolen and misrepresented ID's, that it is better to use what we have.
It would be different in a different reality.