The trick with using technology to assess "driving while texting" is that texters are often the passengers in the car. Waze tries to deal with moving typers by having an alert that pops up thatsays (roughly), "You can't enter text while moving" - but has a button that says, "It's ok, I'm a passenger."

The trick with a $75 fine for texting while moving is passengers. If you're willing to ban texting entirely while moving though, using technology to assess small fines could work!