As I explained before, killing fireninja only tells us about Kirby and does not tell us anything about kit or you. It sounds like a bad idea, yes, but in actuality I feel we learn a lot more if we lynch either you or kit.
Also, I openly admit that while I've played mafia for several years on a different forum, it is much more laid back and less active than TBT, so I have much to learn. After reading Karen's post I can see the other perspective, that lynching fireninja would be important to confirm Kirby for sure, and we can sort out you and kit later. 
Why f11? I'm open to change and want to vote for the person who's most likely to be scum AND who will give us the most information. To me, it seems like fireninja would only help us know about kirby and not you or kit, but killing either you or kit would help us know a lot more about a lot more players.