The thing with the gas pipes..
If when we smash them, we activate some sort of zombies around the building we are into, few floors up/down and probably around the POI (sorry performance rates) could be cool. By that I mean much, much more than the ones that activate when switch the valve.
With some splash damage, just to be sure its not so easy and that we should try to behave.
No doubt we can`t wait to see it how it goes further. Also, flamethrower turrets.