I would like WebEx to be able to automatically mute microphones and/or speakers when an audio loop is detected. This could be used in any environment, but specifically mute laptops or mobile devices in a conference room that has a telepresence device (or conference phone: Think about weighting the priority of what to m ute by device type and role). I expect that if proximity is enabled in a conference room, the WebEx App should be able to detect that and hopefully tell if that conference system is in the same conference and auto mute devices in the same room (of course allowing the user to override with a warning stating this action might cause poor audio (audio feedback)).
We frequently have people bring laptops to conference rooms (could be a conference room or a coffe shop) and multiple people join the WebEx so that they can see the shared content more easily, or work on other work. When the users connect they may or may not remember not to connect their audio. If multiple people connect their audio, audio loopbacks can occur.
There might even be some interesting ways that the tone used by proximity might be able to be used.