Anything with "assassin" or "azn" in it.
Looking at you, maple story.
"YourRealLifeName"+BR/SWE and so on.
the future is bleak, uncertain, beautiful
tomorrow they might come and arrest us all
only if you listen closely can you hear the machines
beneath the side walk whispering
the machines beneath the side walk are
strive to listen close
please, try to be free
don't be afraid
the end of the world will never come
Any of the infinite variants of 'Sephiroth.'
One you get up to three X's, two ys, a dollar sign and an underscore, you might want to just pick a different name.