Abstract: A method, device, and software, for monitoring whether use of a packetized network is commensurate with a preexisting transport service election designated for a user, is disclosed. Also, a method, device and software for selectively discouraging such non-compliant use is disclosed. Packets associated with a user are received and at least one parameter of the packets or an absence of such a parameter, which is indicative of a transport service required by the packets, is inspected. Packets for which the required transport service does not comply with the preexisting service election are identified. If desired, the arrival of the non-compliant packets is selectively delayed by a duration sufficient to degrade the quality of the non-compliant use, which discourages similar non-compliant use. The one or more parameters or absence thereof of the received packets correspond to particular fields within the packet that are indicative of the transport service required by the packet.