I guarantee it happens in a tank. In fact, when you are spouting "rubber" bullets, you can't even get a smoke round to smoke.. This has happened to me many times in a large GV battle.
Last night was the first time I had rubber bullets in a plane. I emptied my 163 cannons into a B24 with no effect. Solid hit sprites, no damage.
I didn't film it because I don't film my flights unless I am in a great ACM fight, then for my own education.
Trust me, it happens, albeit quite rarely.