How about giving guild owners the ability to mute the entire guild?
It might be able to work like this:
In the options there are toggleable settings for the guild you own (must be on-tag if that makes coding easier). We may be able to fill it up more, not sure. The owner of said guild can toggle a sort of "mute all" option. However, as a towerer I know it is important that the people with powers can talk. Thus you can give someone the ability to talk if the guild is muted.
There should be a picture somewhere around here basically explaining my last two hours and why something like this could benefit towering in general.
I would like to hear feedback on this idea, as I believe it is something a lot of guilds would like.