The key thing here, in terms of my viewpoint concerning selective participation, is the online stream. It's there, it's convenient, I can listen or not listen. I can comment or not comment. I wouldn't mind if somebody presented 3 CD's worth of material. I might not get to all of it, but knowing that I don't have to get to all of it, I'm still going to look for something interesting, puzzling, appealing, recognizable, or whatever. Something that I want to respond to. If there wasn't time for me to get through the whole list of cuts, oh well, too bad for me, but no harm done. If the presenter was (hypothetically) offended or hurt by a low level of response, then they would need to consider presenting less material next time. But to make a law that people can't present 3CD's worth of material seems completely unnecessary to me.
If not for the online streaming, and if we were still mailing out CDR's, then that's an entirely different scenario in terms of responsibilities, expectations, etc etc. That's where we've come from, so I wonder whether some of those thoughts about needing to listen to and respond to everything is carrying over from that era of the BFT.