On Aug 6, 2013, at 5:36 PM, Martin Rex <mrex@xxxxxxx> wrote: > Maybe attaching such a sign to the MIC from the start could > additionally improve the situation. There were signs like this attached to all the mics in all the rooms at this IETF. I never looked at them, and I doubt anybody else did either. Certainly the evidence would suggest that they did not! :}