If the tool is absolutely-committed and often a zero-shot, it feels more like chaff than a gameplay mechanic.
Having only one pro-active player in the server seems very boring to me. That is why we allow non-AuG holders to earn points in MWtGG, why Living Daylights spawns multiple flags, etc. This would be like TDM except one guy has no guns and is off doing something over there...why does he keep bitching about wanting someone to cover him, anyway? At best, it turns into Escort without the sense (and guidance) of linear progress, and at worst will become something as dull as a 25-minute defense on TF2's Dustbowl Stage-3.
Covert Modem ftw.
Since we abbreviate scenario names obsessively, Launch Code is superior to Codefinger because it has initials, if for no other reason.
Hacker should be armed with DD44, as the scientists were in the game. Ammo would be limited to something like 8|8 and no ammo pickups to ensure it's defensive-only.