"drunk driving while watching porn."
"viewing of" ... anything other than the road ... "while hurtling down the highway while nominally in control of a tonne-and-a-half of car ... is driving without due care and attention.
So they will let him off, if he can prove he has powerful friends in politics, or burn him at the stake, if he is one of the little people.
As for the legal definition, its in the Wikipedia, so it must be true! ;)
i.e. "Driving without due care and attention or careless driving is a moving traffic violation. As a legal term, it is used within the United States and the United Kingdom. It is usually a less serious offence than reckless driving (also known as dangerous driving) though more serious than driving whilst using a mobile phone. It is often punishable by fines and/or endorsements on a driver's license."
But then moron wankers such as this Prime Example (Primate Example?) also often end up winning their own Darwin award!