"I also contacted the Embassy, Consulate, Police, etc., without much luck."
He said he already tried getting law enforcement involved.
Maybe he plans to use lawyers as a last ditch effort, if his internet plea doesn't work? I would think it's a bit extreme to involve them first before trying to just settle things with McDonalds directly.
For the record, I totally love his research. When Google Glass debuted I said aloud "Wow! It's Steve Mann's EyeTap!".