you code it and sure as long as it isnt retarded (like model for stunstick is a pair of boobs or chris's beard or a bag of weed or a..........)
I'm pretty sure there's noone around who has actually seen my beard. At least not since a thread from a loooong time ago where we were barrel rolling, and god knows if any people from that thread are in CG.
And yeah any kind of cloaking would be OP.
There is always the disguise which allows you to walk around with no name popping up which you can use to do that exact thing you mentioned....since so many people in one group hard to notice which one has no name showing up...