Well of course you should have a complete control of what is displayed in your chat log. for example the message from when someone from your linkshell or friends list logs on/out (I think it should be both) could be part of the system messages. Turn them off in a window and you don't have to worry about it. But it would be nice to know when your friends come online so you can say hi or good morning/evening or whatever I would like this feature.