It's abuse if you don't do it on sombody without asking first but, here are some interesting things that can be done with Code Edit, especially for those who want a status with flashy colors.

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!!!PEFORM AT ONES OWN RISK!!!
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Suffix
I'm no coder, got no real idea of it's purpose but editing that is like this...

Gyro Gun Messed with Suffix!

But it's on the players online, so you could pretty much add a keypoint to yourself encase sombody wants to find you when there are masses of characters around by tons of people.

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Status
Enter it in with text any way you want, bypass the limit but not always reccomended, best for for those who want to stand out in a text-fashion kinda way, abuse if done without permission.
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Owner
Steal and NPC for either good or bad, either abuse or to delete an NPC that is just offencive.
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Spam
Setting this to 1 can screw sombody up, setting this to 0 is also a fix, eliminate the wait for being able to speak after displaying an image.
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Key
You can silently boot one or two people with this by changing the text to sombody else or somthing that is not a name. Might just bug your server or have fake players on the list (They don't add to total plays by the way. XD).
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Peforming admin abuse with these is your fault, not mine and I will not be responsible for your code tinkering, but this is mainly to help hosts/head-admins get a little more out of one command.