Two problems with unscheduled communications: 1. It allows the adversary to disrupt communications by continuously sending junk. Solving this problem was a ma

Two problems with unscheduled communications: 1. It allows the adversary to disrupt communications by continuously sending junk. Solving this problem was a major goal of Dissent not adequately handled by previous designs based on Dining Cryptographers networks. 2. Without a schedule telling everybody when to send something, the first guy to talk is obviously the sender, destroying anonymity.