Nothing annoys me more than scouting and spot an engineer building a/many turrets and not being able to hit him because the turrets collision blocks it! I aim at the head, nothing is visually in the way, yet it hits the turret and not the player. Sometimes it will hit the player, and do no damage but leave a blood decal. So they run around with a headshot wound but no death! I think this should be fixed because if anything should provide cover, it's a wall.