During the outage today we got all the standard warnings about not
backfeeding because it can kill linemen.
I can see that happening if your house has the broken wire, but if it is a
large area, it seems to me (speaking from a position of almost complete
ignorance) that if you failed to turn the main breaker off, you would
effectively be trying to feed the entire region, and your generator would
stall. So, if you are running, it is an indication that you did in fact
shut off the main breaker.
Does this make sense, or am I over looking something?