And here I was watching the episode thinking that they depicted law enforcement with just the right moments of excess and, yes, restraint to make them seem realistic to the experiences of quite a lot of people with whom I've worked. 
It didn't need to be subtle. It didn't need to show every angle. Trek is often unsubtle, even in its greatest hours. It just needed to shed some light on a social reality, on things that really happen, and as far as I can tell, it did.
The fact that it has raised ire tells me Star Trek is still doing its job.
Or they didn't forget. Matalas has commented that since there was no TNG crew as we know them to go back in time, Guinan never met Picard. And the punk on the bus might simply be remembering the after image of what happened to him before time was broken.

It didn't need to be subtle. It didn't need to show every angle. Trek is often unsubtle, even in its greatest hours. It just needed to shed some light on a social reality, on things that really happen, and as far as I can tell, it did.
The fact that it has raised ire tells me Star Trek is still doing its job.
They could remember enough Trek lore to get the punk rock guy back...but not remember that Picard and Guinan had already met...!?!?!?
Hell, they remembered that Guinan was on Earth, and had been so for a long long time...but they didn't remember anything else about the episode...???
Or they didn't forget. Matalas has commented that since there was no TNG crew as we know them to go back in time, Guinan never met Picard. And the punk on the bus might simply be remembering the after image of what happened to him before time was broken.