The only trouble with Q&A is that oftentimes the question involves a large subject that, in order to properly answer, requires far more time than is available. You could easily spend a whole evening just discussing one of those topics. Consequently, when you only have time for a few sentences in answer, I expect that the result can be dissatisfying for some people.
I was sitting right next to the questioner who asked what Dr. Paul took as a question about "anarcho-capitalism" and I am certain the guy actually asked about "narco-capitalism". I noticed that Ron had a lot of difficulty hearing the questioners (many of whom rushed through long questions in less than "radio-voice" tones) so I wonder if it wouldn't be better if questions were submitted in writing before the speech. The best questions could be selected. That would solve the communication issue and allow Ron a little time to better formulate an answer.
Still, it was a great night, one I shall always cherish!