Whatever exists is not sufficient. By definition, the wording is never precise enough to cover the current issues.
On the other hand, in an ideal world it wouldn't be "the people" who would need to grasp the difference, it would be enough that the police and judges be able to give proper arrests and decisions.
It should not be necessary to have a law against texting so that a cop can arrest someone who is not paying attention to the road. But such is the madness of our times that no one can accept "driving dangerously" as a valid charge. No, it has to be "driving without his having hands on the wheel due to smoking a cig, texting on his Blackberry and shaving in the mirror".
And anyway, if we took a good look at our existing laws, we could most probably find a valid interpretation of it to sanction any socially deviant attitude, but that would mean that our elected Parliament officials would officially not have anything to do - which would in turn mean that nobody would have any use lobbying them, and THAT would mean the end of a nice big flow of moolah.
Can't have that, now can we ?