Apparently the Germans don't recognize a PhD degree as conferring the title of Doctor, so they charged an American researcher working at the Max Planck Institute who had no idea there was a German law on the books about this. Poor guy. Talk about something coming at you out of left field. He could go to jail for year. Some of the comments posted in the Chronicle of Higher Education about this are quite funny.
http://chronicle.com/news/article/4134/whats-up-doc-german-law-bars-amer...