This is my local police area.
They have specific issues with large (5000+) impromptu (well, every other Wednesday at some locations and monthly at others - just long enough between for the cops to forget what happened last time...) gatherings of crotch rocketeers who show off to each other.
The Red card / Yellow card is taken from Soccer (and to a certain extent Rugby) where in order to have the suppoorters made aware of what is happening out on the field - we haven't quite caught up with mic's for the officials like you have - these cards would be flourished to indicate a warning or a sending off.
The "Driver's Ed." is something you have had for ever and it is slowly catching on in UK
I have "undertaken a session" and would actually pay to do a refresher every couple of years
They are run by ex-traffic cops who know how to "make progress" within the law and have loads of good tips and ideas to make riding safer (and faster).
Here endeth the "English" lesson (Sorry Hub)
Cheers
Dave