Audience Question at Conferences

I’ve been watching the videos of last year’s Singularity Summit and noticed that, along with all other conferences I’ve watched, questions from the audience are completely inaudible to the sound recorder. There is a very simple solution that I haven’t seen anyone using: The parabolic dish and microphone set that makes such great spy equipment. Just have one of the A/V people point this at the audience member asking questions, and their question can be clearly recorded (and transferred to the PA system in larger halls), with the added convenience that nobody should have to shuffle and squirm all the way to audience-deployed microphones. Not only would it provide better quality recording, but it should also benefit audience-speaker interaction.