The flip side of this... Several times I have had a teammate on a barricade or something in a much better position to throw a smoke grenade than me. I have called "oi mate", clearly showed him the smoke grenade and gently thrown it underarm so they can pop the smoke. Free pyro! Great right? Smoke out and we all advance across the bridge or open area. No... They promptly run away and get shot thinking I had somehow got behind them covered them for fun and decided to taunt them with the means in which I would end them.