But a reporter feeds questions to one of the guys, and that's ok?
No, and we on FR were rightly furious about it.
This is a tricky situation as "everybody does it". The bad part is that having questions planted in an audience is just dishonest. If an administration wants to make certain points then they should make a speech, not plant questions.
This has been going on for a long time, so it is hard to blame Bush for doing it. This is one of those things that you have be very discreet about if you're going to do it - otherwise it makes you look like a jackass.