Two years ago in NY a guy in a group near me got cited for driving an ATV with someone sitting on the front rack while they were checking traps. The guy sitting on the rack was also not wearing a helmet which is why, I think, the EP stopped them in the first place. But the driver, who was wearing a helmet, was also cited for illegally carrying a passenger. From the regulations:
YOU MAY NEVER OPERATE AN ATV:
- Other than while seated on the permanent, regular seat.
- With a passenger, unless the ATV is designed to carry a passenger.
I think what you're talking about would be both pretty dangerous and totally illegal. He's also going to get absolutely douched if there's any water or slush on the ice. Riding in a sled behind it is fine as long as it has a rigid tow bar.