Why does everyone have secret nickname?

[Fate]

Yeah, I have a secret alias. It's Kri- ...er... Nvm.

Well, Reborn and Woolly summed up my reasons for having a secret alias nicely.

2) Play well and get challenged by some random new clan that claim they can destroy you, then play them... win and get called a hacker...

2. changing to a noob name and then owning with the -AR- SMG gives me that trololol feeling.