1. A method of detecting unwanted conversational media sessions, said method comprising: utilizing a fake conversation client in a manner to cause an originator of real-time CMS data to setup and initiate a real-time CMS with the fake conversation client; and generating a reference data item based upon at least a media portion of the real-time CMS data received at the fake conversation client, by one or more of the following: recording data in respect of at least a media portion of the real-time CMS received at the fake conversation client; recording data in respect of at least packet arrival times corresponding to the real-time CMS; recording at least a sequence of significant attributes directly from a bit-stream corresponding to the real-time CMS; and publishing the reference data in a manner to enable a client in receipt of the reference data item to control real-time CMS data received at the client using the reference data item.