I love how on these "group rides" everyone else just keeps going and no one stops to help these fallen guys.
Guy crashes.
Emergency Services, including police are dispatched.
Going by in a cage, no problem, I'd stop.
On a bike, if there were people already helping, I would hesitate.
How different is my bike, gear, and demeanor to these riders.
It's all fine to stop and save someone's life, but there's the possibility that you could also share the same court date.
In the case of the riders themselves, some may have lost their licenses, never had a license, or be riding a stolen bike.
Obviously, to them, the risk of staying outweighs any potential good that they could do.