The problem with Faraday is working us theory, which I believe I mentioned first (my very first fucking post, see page 11(max posts per page)), is that scum knows the majority don't trust Faraday, but will follow his every word. Why would they kill him (assuming town), when town will lynch him if he lives long enough.
Of course, depends on how arrogant the scum team are in pulling that off, worked in Kenshin mafia with HoL for me.
The majority do trust him which is why they follow him. And how many times has a good player been lynched because they've been alive too long? I highly doubt it's a high percentage of the time.