I think the police is right in checking the physically challenged rider. Any two wheeler or four wheeler which doesn't have a top is considered to be unsafe for the person driving the vehicle, especially the head. If the vehicle meets with an accident, the scotter (2/4 wheel) is likely to be thrown away to cause head injury.
Why should a physically handicapped become more handicapped due to head injury ? The police is right in taking action action the physically handicapped driver.
No life without Sun
The four wheeler scooter isn't safe as this remains free from all sides & can easily be lead to unbalancing causing the serious accident. This is even more important that this got surrounded by the heavy vehicles from all sides with the uncertain or unexpected movements. Its good if we keep on with the helmet with us because it's our life & it's our choice to about how to take our safety because at a time it's none of other's business.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease