Early warning system

Unnamed Administration sources reported that Sean Donelan said:

During the rolling blackouts on Monday and Tuesday, one of the complaints
was the lack of notice before the lights went out. Would it be useful
if you received advanced notice before a rolling blackout? Or would you
do nothing different, and wait for it?

The folks who would benefit the most are not NANOGites,
but rather the people then NOT caught in elevators..

(But I worry that if you gave a mass warning, and
everyone turned off her/his PC, etc... would there
then be a surplus so ISO cancelled....etc. etc.)