Does anyone disagree that there's a better way to say, ...*ONE LITTLE
MISTAKE WILL PUT ALL YOUR LIGHTS OUT?*

I disagree.

Sometimes, one needs a blunt instrument to get the message across to
pilots who think that they are immune from the laws of physics, or that
certain rules don't apply to them. A more subtle approach may easily
miss the target.

"Do this and you will probably die" is sometimes called for.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.