Re: Risky local variable mechanism

["Richard M. Stallman" <rms@gnu.org>]

    If you want to be really restrictive, you can introduce a list of
    `safe-local-variables', and prompt for anything outside that list (the
    prompt could have an additional choice, [(a) always allow this
    variable], a variable to the list).

Perhaps that is the best solution.  However, if only 2% of all file
local variable settings are outside that list, it will still cause
annoyance to a lot of people.

So let's first see if some more general method based on custom types
can be made to work.  If that can't be made to work, we can fall back
on this approach.