I’ve lost quite a few games due to teammates blocking me accidentally. Generally, the teammates that do this aren’t even paying attention or trying to stop someone from planting or delivering so I’m the last hope for our team to win…
Example: Trainyard, final objective. 10 seconds left. Attacking team makes a final rush. I’m on the bridge waiting for them to come in so I can pop their heads off. A Kira hops in my way shooting a jumping Aura that’s heading toward our spawn. She spends a few seconds doing this while I’m trying to shoot a Proxy that’s delivering. Of course this Kira happens to get in my way and the couple of shots I managed to get in before she did so did not do enough damage to kill the Proxy. Therefore, GAME LOST.
But I wouldn’t really want bullets going through teammates other than bolt-action sniper rifles.