Is it really NEVER the fault of an audience that they don't get something? I think sometimes it is their loss. Groups set up in odd ways, and they may have some conventional expectations that cause them to miss a perfectly clear expression of something. I can think of some big examples of this, I think anyone can. It's awkward and unfortunate when things don't come off, but maybe it can be considered apart from whose fault it is. Sometimes it's worth trying anyway.