Just noticed this playing hostage situation.
Anything you do will spook the enemy into killing hostages let that be a shot from a supressed rifle or just a little kick on the door, but if you throw a flashbang in the room next to them with huge cracks in it they wont even blink. I think even if they shoot at you its no problem as long as your team doesnt shot. The only thing i find undetectable atm are flashbangs and tasers.
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