I think you're be better off focusing on the small arms, RPG and IED threat. People getting that close to your vehicle should be monitored by the gunner and the TC. I sit sideways in my TC seat, (snaplinked in when we're on the highway moving fast,) whenever we're rolling through urban areas. Having no canvas door gives you a better field of fire, lets you un-ass the vehicle pronto, and gives all passersby the impression that you're ready to hop out and engage them if they so much as glare at you wrong. (It also helps to have a .50 cal gunner with an acute case of claustrophobia; people understand that even humvees have 'personal space' when a ninety pound machine gun points at them).
Sometimes the best defensive posture is an aggressive and alert one. If you go out like you're looking for trouble, they'll wait for the next convoy. The guys who need to worry are the ones that look scared (or inattentive) while they're on the road. Roll out every time like you're itching for contact, and all but the most serious nutcases should leave you alone.