Just how long do you think you can target someones eyes in a moving car? I am not saying a pilot or driver is not going to notice, but to cause actual harm would be really hard.
car != someones eyes in a car. First off the front windshield is going to act as a beam splitter and cut off 1/2 the power or less considering how dirty and scratched up the glass is). Second, safe exposure to the full beam for 0.000011s is not going to cause noticeable short term damage. These things are vary dangerous to friends playing in the backyard, but once you start taking about poeple at a distance in moving cars it really comes down to luck.
PS: At 60mph it takes 370 microseconds seconds to travel 1 cm. If you stuck one of these at the side of a subway tunnel facing the people inside (at eye level) at most you could cause mild short term damage. Trying to nail peoples eyes on cars on the freeway without some sort of tracking system would be really difficult. And obvious that something was happening.