i think if someone damage it he should lose 50-100 and for destroying he should lose 100-200 and if someone killed the one that destroyed it he should not lose karma for killing him even if someone gives 1 hit and others kills him they should not lose karma
If you make it work that way, you might as well implement that into everything.
i.e. I shoot you first, but you end up killing me, and we're both inno's. Instead of originally you losing more karma, I would be the one to lose the more karma.
I don't see your idea working like you think it will.
With the Health Station, as the Detective, you should hide the Health Station, and only let those who are proven use it. If you hide it, it should last long enough, but not always.
Karma loss, I believe it should be a small amount of loss.
Me personally (even though I don't anymore) wouldn't hit the Health Station if I knew I was going to lose karma.
And for the topic of people shooting back at you for hitting the HS, that's more their fault. Even though it is Traitorous, if you're smart, you'll realise they're just trolling or very sneaky T's.