The requirements are enough to stop people from coming up off the street and screaming for an hour. But they are not so cost prohibitive as to stop someone interested in the process from taking a few classes over the course of a couple months, completing a few projects, volunteering on other programs, then screaming for an hour. For a one time membership of $25, you can get instruction in control room operations, directing, producing, and basic studio operations. For an a extra $60 -90 per class(4-6 x 3hour sessions) you can get more in depth training in other topics - Screenwriting, Final Cut Pro, Webcasting, etc. I cannot speak to the caliber or rigor of the instruction but the price is right to get training in something that everyone on the Internet is doing so poorly.
Of course, you supply the crew and they all have to become members and go through the free classes. So it pays to make friends with others who may be recording before or after you, in case you need to someone certified to run a camera or direct the action.
All in all, an interesting evening. Check out the www.richardbrownshow.com for public radio and television in action.