Ok, under that definition this makes sense. I played pacifist runs twice (dominating, xp) and always bit the bullet that arena means killing some people. JKK faction can be played without killing except for Bogdan, so I preferred this over having "friends" kill for me. My house rule for pacifism was robots don't count if they can't be avoided (but if possible: robots are humans, too) but I also did not kill anything else, let those rat hounds live to see another day.
That made Newton in the beginning of course quite a stretch: avoid killing the beetles, tell Newton he can make it and pretend I didn't know they would kill him...
And then try and sneak out of the bunker... bad memories.
I guess you are right, our mileage may vary as to what we consider "the rules" for a pacifist run.
I was really hoping there you would have had a way to avoid the arena. For instance, if you allowed the JKK faction quest line to unfold without being arena champion (JKK becomes aware of you because you managed to do a lot of things without making waves...), made the Bogdan quest completable without killing the guy (just run away once he attacks you) and all of a sudden, you would have a play-through which I'd call "reasonably pacifist". Maybe even talk the big bad at the end out of killing you with high persuasion?!
In any case, OP: doing a stealth run without killing nearly anything is extremely fun!