Hehe I wasn't talking about trashy fashion on lightrail. During commute hours, ligtrail is very normal. Business people, students, and simply regular people.
Around 6 to 9 pm, lightrail gets very janky. Kooky people talking to themselves, gang related activity, etc. I've been riding lightrail since the womb, so I have just about seen it all, from drug deals to fights, people making out, performing sexual oral activities, and hip hop dance parties.
I don't encourage wholesome honest families to ride lightrail at night. However, once downtown becomes more dense and alive, I feel lightrail at night will consist of a mix of interesting people, from kooky to normal and sane, and would offer great opportunities for people watching like SF transit does.