Per Stormin Mormon:
In driver ed, we learned to put the four way flashers on.

Love the "drunk magnet" descriptor.

The guy from the ACX specifically identified flashers as a
problem.

Having read this thread, I'm with Pete C: Don't just get as far
off the road as possible and turn the lights off; but exit the
vehicle and get even further away. My choice in getting further
away if I had a choice would be upstream from my vehicle as well
as further laterally.
--
Pete Cresswell