Take [link|http://en.wikipedia.org/wiki/Cornelia_Rau|Cornelia Rau], who was wrongly imprisoned as a suspect illegal immigrant for 10 months, because no one was able to diagnose her schizophrenia...
Or [link|http://en.wikipedia.org/wiki/Vivian_Solon|Vivan Solon] - where it seems the Austarlian government was able to hide the fact she was wrongly deported, for two years. The sad part is that her family had listed her as a missing person as they didn't even know she had been deported...

Sigh.