IRC style means that you create a relay kind of structure. "they" control the communications in big part because all communication has to first be sent to their server and then they route it to the destination. In IRC style architecture, you can start creating your own "routers".
Think about it. Why can twitter and facebook ban Trump's account? It is because all facebook and twitter accounts have to go to the facebook / twitter server to connect to your contacts. You cannot communicate with your contact directly. This allows facebook and twitter to analyze your communication graph and to shut you down.
In IRC style, communication between peers is not dependent upon such a central server for routing. "IRC routers" would contain routing information between peers, and even if one router were to be brought down, you could always relay the message via other routers, thus making it impossible to shut down accounts like facebook and twitter does.
IRC style means that you create a relay kind of structure. "they" control the communications in big part because all communication has to first be sent to their server and then they route it to the destination. In IRC style architecture, you can start creating your own "routers".
Think about it. Why can twitter and facebook ban Trump's account? It is because all facebook and twitter accounts have to go to the facebook / twitter server to connect to your contacts. You cannot communicate with your contact directly. This allows facebook and twitter to analyze your communication graph and to shut you down.
In IRC style, communication between peers is not dependent upon such a central server for routing. "IRC routers" would contain routing information between peers, and even if one router were to be brought down, you could always relay the message via other routers, thus making it impossible to shut down accounts like facebook and twitter does.