Its ment for killing people behind cover. Thats just an added bonus lol As for call out, I only do it in a tactical situation. If im on defense tossing into the red zone I wont because there shouldnt be any freindly there, plus this would cause unessesary blurts in communication if you had a handful of people doing this with the popularity of grenade throwing. On a raid however where there is no such zone, I will announce the throw-to location if freindlys are nearby for both frag,flash and 203 rounds. "Fraging SE door" "Flashing NE trench" "203ing West bridge" no need to be complicated, all 3 are something for both teams to avoid being near.