Quite possibly much larger. Even here in the boonies, I see far too many idiots with their cell phones in their ear disobeying laws, and displaying dangerous habits. It's a matter of time before one of them gets nailed or nails someone else.
“Critics say it could be a problem as bad a drunk driving.”
I think driving drunk is worse but the problem of cell phone talking is worse because you have many many times more people jabbering on a cell phone than you do driving drunk and that makes jabbering a bigger net threat to me and my family.