Many times i have seen 2 players get into a fight, naturally fights rarely end with both players being in good condition, because both will want to "win" aka render some one incapable of hitting back and i've seen many times it end with them both being admin stunned. Why? I mean, both wanted to fight, non ahelped, so why intervene with the admin stuns? If there is no intervention it will just end with them both going to medbay and moving on with their life. Surely if one kills another then thats over board. But i don't think i saw it happen once.
In my opinion if two non-antag players fight each other and they are cool with it, there shouldn't be anything done against that.
Or if one player is clearly letting other player know that his actions are provoking him into a fight and he can easily avoid it, if fight starts, no need for intervention.
I feel like this is how it should be.