Yeah, just remembered a game that had a really good disguise system, "The Saboteur"

I'm adding this one in 0.93, seemed to work nicely at least when being alone there on the spot. I had enough time to call one mortar strike and a 4-man reinforcement drop, out of which 3 joined my squad (I had 4k XP) and at least one had medikits and he managed to heal me in time.

I was actually thinking about making a more stealth oriented game when I had just started to work on RWR, and was watching some videos of Saboteur, wanted to have a setting much like that.

Eventually I decided against it as it would've involved creating elaborate civilian AI to get the environment live and to be able to hide in crowds, it would've needed vehicles which I had no intention to make and all sorts of other stuff, and I was after all targeting to make a game I could finish before 2012 Well, I always say we are working on RWR 3 right now, so I kinda of finished RWR 1 in time in the end.

...then when enemy spots player shooting their allies...

Here's the gap: the AI would have to track every fellow soldier in disguise it can see without occlusion, monitor them for shooting events, check if the shooting is directed towards any other fellow the AI sees, and if so, do something to make disguise item consumed.

Really? This wasn't resolved? Are you kidding me?

This is a game breaking flaw. Nobody wants to crawl around aimlessly for a century without the option to respawn. Take a look at some good multiplayer shooters, excluding the ones with a timed respawn or no respawn. Even the ones without the possibility of being downed have a respawn option. No, your AI isn't good enough to seek out and kill or revive a downed player—evidently. What if you are behind enemy lines by yourself, or just playing single player? Is waiting for a mandatory half minute in a game about being in the action fun, or satisfactory? No. In fact, it was worth making an account and filling out your childish security question just to tell you what any decent game developer knows already—finish the basics first and then get ambitious, otherwise your game will be half-assed and broken and your player base will be mediocre.

Really? This wasn't resolved? Are you kidding me?
NIn fact, it was worth making an account and filling out your childish security question just to tell you what any decent game developer knows already—finish the basics first