First enjoy the chat and try to let others also (aka don't spam)
You can use a normal IRC client to access this chat.
There is an ignore feature highlight the person's name then right click. a pop up window should come up and one of the options is ignore. This is the main advantage to this chat over TS.
no spaces are alowed so you will just have to use an underscore.
Under the list of members (users) you can select if you want your message to be private, to the room, to be an action, or to send a sound.