Were I in your situation, I'd take your little brother's SuperMaxx 5000, fix it up like Black Wrath's one, then you would have a weapon worthy of being pretty gnarly. You'd probably not be able to use it much in any of your organized wars, though. I know I don't with mine.
But for "Assassins"? Most guys I know that play similar games on campus are using NiteFinders, TechTarget Blasters, or AT 2000s. How you would conceal a big 'ol monster weapon is beyond any of my guesses.
...the second somebody gets on a computer they feel invincible behind their keyboard, its not cool.
It really isn't cool. If you heeded your own advice you'd probably have to defend yourself a lot less.