I think it might be interesting to place metal detectors in the game world; exits with metal detectors on them would be noted. Trying to pass through one while carrying guns or metal objects would set it off and send the area to full alarm (possibly a high security or computer skill could let you disable it if nobody is watching?)
This would also create more use for non-metallic melee weapons, and for melee-related combat skills.
So we all still call you Crazy Joe... Sometimes Crazy Bob to mix it up :)