Let's not go down that road. It's fairly apparent that he was baiting them into either overreacting or making some type of ridiculous statement. (which he was successful on both) If there was any legitimate type of reasonable suspicion, he did nothing to dissuade it.

If he broke no laws, then why wouldn't he answer the questions? How many travelers would have acted in the same manner? I'm going to guess relatively few, as these cases aren't popping up all over.