It would drive me nuts to read a caucus thread and not be able to state my opinion. I’ll read something, disagree with it, and then realise I can’t respond.
I do occasionally read a caucus thread if it is on a subject I am interested in. I don’t read the mormon caucus threads, because I have no interest in it.
I often ask and am allowed on caucus threads (mostly Catholic and Orthodox) because of my background in both of those faiths and my scholarship areas even though i am not actually a member of either caucus.
And it will probably be a cold day in Hell before I am invited or allowed in an LDS caucus thread.