They may even go to jail if they kill someone, thus preventing them from doing any more damage
Sorry to break it to you, but I don't feel that jailing a random person is a fair trade off for losing a friend/family member permanently. We want prevention and not reaction. The law is a decent first step, make the cost/benefit for texting bad to reduce incentive to do it. It won't work for everyone but it works for many. Next, educate with the new income from fines and increased insurance costs.