How Do people see SUPPRESSED IPS on parachat ?

Hi every one:
This is my first post. At first I was really hesitant to ask my questioin, because people might not like my questions or they might not like the way I ask questions.Anyways, I am posting my questions and the question is "how do ppl see SUPPRESSED IPS on parachat chats? . I mean people other than admins of that parachat room?. I thought this is one question about chat security. I would appreciate any help , plus It will help newbies to understand IPS and suppressed IPS in chatrooms and how do people exploit this.
Thank YOu