I personally think this is the "Honeymoon" era of the ebike in general. Something like this will only shorten the honeymoon period. Already there are elected officials looking to regulate ebikes. For the sake of clarity I don't care what machine people ride as long as they stay out of my way but human nature being what it is there is always going to be those who push the limits of what is commercially available. As soon as that happens and the kid of some elected official gets killed on one of these bikes soon after will follow "xxxxxx's law" to ether restrict them and require licensing and insurance or an outright ban.
The practical in me say's that if it is a dirt bike you really want, get the dirt bike.