"Listeners too. Hmm. You realize that's just the equivalent of a blind carbon copy in an email," says Stella. "If I want to talk to the completely imaginary Albert and Bess and Chuck, and Chuck doesn't want the other two to know he exists, then you're saying I shouldn't be able to do that all at once? Mind Chuck won't be able to hear anything Albert and Bess say without my manually relaying it even under the existing system, since they won't be sending to him."