Always wondered.... (Score 1)

I got a ticket in Dallas once, and my dad got one in Miami recently. Looking at the pictures, and even the video in my case) you can see the infraction...but you can't see the person in the car. Now I don't have tints or anything, but the video is shot from the back in both of those cases and you can't see me or my father. When I got my ticket (several weeks after the incident), I was honestly not sure if it was me or my then-girlfriend driving my car that day. So how is it legal for them to ticket en masse without verifying identity, only identifying the car itself?