If this were an issue it would have been all over this forum by now.Having been rear ended in a bad accident in the past, I'm a bit more hypersensitive to the possibility.
I almost always slow using regen only, i.e. no brake lights. If you are braking enough to be worried about the car being you,
you generally will be on the brake pedal already anyway.
One of the ingenious things Volt engineers tuned into the Volt. Some regen braking, but not too much.
Also, giving you some forward creep when off the gas. Feels like a regular car, not like a battery golf cart.