It's not. I frequently run +4x8 on Nam and aren't hit by MARTy. Terr's farming hasn't triggeed MARTy to my knowledge. They only time I've seen it, thusfar, is a bug when I logged on just after a patch, and everyone was getting throttled by it.
So unless you are an uberhax exploiter, it's not a concern.
So unless you are an uberhax exploiter, it's not a concern.