bit of a stupid question but what does it mean when someone is "non-existent" and also what coloured usernames mean what. I know blue means GM and yellow means legends and red means admins. is there any others?

Here is all the staff
also, item forgers have a purple text, but, thats it for them.
Non-existent means banned pretty much, from forever to a day
here are all the banned people
(get rekd moose and azze)

Non-Existant = banned

Staff list http://forum.toribash.com/showthread.php?t=330401

non-existing means that player or account is banned.

Blue names = smod
Red names = admins
Yellow = legends
Dark blue = gm
Green = msquad
Black = clan mod

http://i.gyazo.com/7890afd75fbe2a12ac82d7b200eb3aad.png
last person to get banned 0.0 and judging by infrac build up that means perma due to having too many infraction points.
anyway. thanks skylar ^-^

its not a perma ban, he got 15 points.
look over hereere

I see your question got answered so I will go ahead and close this thread

You can always check the FAQ there is a lot of useful information there , you can also check the Beginner Sanctuary.