Or are you trying to come up with a way of nerfing Yiski and Zill?
I can see this being a April Fool's joke, lol.
Everyone would be susceptible to it, but it would only be dealt by a L7 player using a gun (whether that's an L7 gunner, engineer or pilot on the trigger).
I'm pretty sure piloting damage (collisions, tar barrel) can already be caused in full to other ships on the same team. If not, that would be part of the deal as well.
There's been a few threads suggesting rewarding high level players with a wider choice of weapons, etc.. - which the consensus is firmly against, I'd rather see the high level reward have a debateable-nerf and increase the challenge. High level blue-on-blue goes a little way towards self-balancing stacked teams - you can stack a team with high level players, but the penalty is that mid-level pilots are likely to use that against you. It could even be phased in.. L5 and you deal 60%, L7 100% blue-on-blue.
I dont think rams do full damage to teammates. At least it doesnt feel it but im also not going full throttle at them. Tar does do full damage to everyone. Ask me how i know, lol.
The "scaling friendly fire" sounds like a good way to anger high level players. I'd have to keep track of who had a lvl7+ gunner, pray to the Skies they arent trolls, and worry about the captain as well because he can force that high lvl gunner to miss his shot into my face.
Im all for friendly fire, but i too agree that no ability to kick (Not a bad thing) plus trolls would get ugly if it were introduced. If any were to be added, id say it would be at like 25%. Then you could repair through trolls, and still make it a reasonable option to not shoot a teammate for lulz.
Oh right, and I still would like a Heavy Flamethrower. Obviously it would need some creative thinking for balance, but would still be fun.