Is it possible to ask a question to people in the Zoom waiting room and get a reply back? It seems the chat is only one way. Indeed I can see trouble with trolls having unlimited chat options but this makes it difficult to usefully use the Zoom waiting room since it gives no way to actually test whether the participant should be allowed in. I would like to allow anyone in who can answer a simple question that only appropriate guests would know.
(See for example: https://academia.stackexchange.com/a/147419/84370)