When few
enough people want a preference that more people
are likely to turn it on by mistake than deliberately, and when
there's significant harm or confusion from turning it on by mistake,
that's a sign that it's a bad preference. (See also: "Use external
editor".)
Not to disagree with your general point, but that specific
problem would be easy
to handle by throwing a dialog with big red exclamation marks
saying "WARNING!
Arey you REALLY sure you know what you are doing?" when one
is about to turn on
such a feature. (Or only showing the controls when the user selects
"expert mode".)
It would be fairly difficult to lock yourself out just by enabling the
option, as part of enabling the option would be to login with the new
authentication method. The biggest issue would be reseting credentials when
the "what you have" is lost.
Respectfully,
Ryan Lane