Revenge / Justice: Take your pick.

[ApocalypsePlease]

The @[numbers] is recognized by Ender's and whatever other clients to highlight an object (the numbers tell what object). It's also set up so it doesn't appear in chat, however it will still appear in a bubble above a person's head if used in area chat. Also yes, it matters which chat you're on, that chat is what will get the highlight. Don't know if that's what you were looking for, but that's basically what it is. If I recall correctly, I think you alt click to do this, could be wrong.

[FictionRyu]

Yes, that is what I was looking for. I was just curios as to what it was about. Thought it might have been some kind of bug/glitch or a spam bot thing..iunno. Haha.