Yeah, thinking about it more, if in NJ, he is driving around like 99% on wet or dry pavement, a good all-season on the rear should easily out-perform a blizzak on wet/dry pavement, and it would be safe to drive normally.Unless forward moving is an absolute must.
Where I grew up people were mounting two snows in the front on FWD. But that is bcs. many streets had 10-14% grade and very narrow. Losing traction in the middle of climb was not an option.
Otherwise, in the back!
But on actual snow/ice/slush he would really have to remember that the car will want to swap ends given any excuse. Especially at higher speeds, or if the car has lots of rear toe in and camber, then you might find conditions where the car wants to swap ends going straight! If he is just looking to get around town at low speeds in the rare snow event, then its not too sketchy.