There are dirt bikes for the street, they are called street bikes. I see some around at times. It's about being road-worthy, headlights, signals, mirrors and such. Do you think these people that do this illegally as is, would when there are places to drive these legally? Or if their manners of driving would be proper versus their complete illegal behavior currently? Doubt any of it and biggest one being them even bothering to have the proper equipment or paying for registration and insurance.