1) AzN_Kronik discovered a trick to
have a blank nickname. Just go to Personal Settings and delete your current
nick. Then hold ALT and press 0160 (with your numeric keypad on a Standard US
keyboard). Press ok et voilà!
2) The "hard enter" has been around for ages (at least from the moment
Stieno told me about it). It allows you to make a multi-line nickname.
However, Microsoft has disabled the possibility to type it manually. Just experiment with it yourself or
use the generators below, it's a pretty cool feature!