Yah right, they're gonna stop everyone on the street without bicycle plates....... Try doing that to cas strapped college kids in a campus and the LEOs will find themselve in a middle of a giant demonstration the next day in every campus. I would say if registration does help curb theft it would be something to consider, but I don't think it ever worked to minimize theft when they did have registration enforced in some jursidictions many years ago.
JMOs

Chombi