Re: Global Font Lock by default

[Richard M. Stallman]

    Also, I think that for -batch, it does not make sense to have font
    lock enabled.

I agree with that.  So --batch, like -D, should turn it off.  But I
don't see a need for -nfl.  You may want to edit a certain file
without font lock, but why would you start a new Emacs to do that?
The way to do that is to visit it and then type M-x font-lock-mode.