Often people are unmuted on Webex when they don't intend to be. The typing can be broadcast to the other attendees, etc. Could Webex sense this? For instance, if Webex knows that other people ARE talking and I'm also making noise (but more ambient than the others??), Webex might display a visual reminder to me: "Do you need to mute?"
I realize this could be difficult - two or more participants could be trying to speak at the same time. But it seems as though Webex might be able to tell the difference between N people talking at once and N-1 people talking but 1 person typing and not talking.