1. A communication traffic control system comprising: a filtering module configured to receive a communication traffic stream, to filter the received communication traffic stream, and to provide a filtered communication traffic stream at an output, the output to be operatively coupled to a communication traffic processing element; and a controller operatively coupled to the filtering module and configured to control the filtering module to filter out communication traffic from the received communication traffic stream responsive to determining that the filtered communication traffic stream is congested at the communication traffic processing element.