It's all about being productive. Not that I condone the fact that she is MPKing people, even if they are RMT, wearing the proper armor not only allows her to do it more quickly, but also more efficiently. Not only that, but by carrying around stupid pieces of armor or other ridiculous shit in your inventory, you are taking away from slots that could otherwise be used for something useful. I say the same thing to people who put roses and chocolate in their bazaar. Get rid of the stupid shit because it serves no purpose.
You're like a nosy neighbor, always in everyone else's business. MYOB if it's not effecting you or anyone else.