I don’t think anyone should be “shamed and harassed at every opportunity”. I remember an episode of Mythbusters where they did a bunch of driving tests and people who were very tired (sleep deprived) performed worse than when drunk. Should we shame and harass anyone who looks tired while driving, too?
I agree that texting while driving isn’t great, but y’know, citizens should go about their business unless there is clear and present danger (driver swerving around the road, etc).