Just when you think the laws here couldn't be any dumber...
"They have been charged with causing grievous bodily harm and driving a motor vehicle with a red plate at night". Not so "dumb".
And what law it that. Can you refer me to the Thai road laws that specifically outlaw skating on public roads? I don't believe you can, but I'm willing to suspend doubt until you do.
He wasn't fined for "skating" on the road, he was fined for obstructing traffic and a road safety transgession so there's no reason for anyone to have to reference "anti-skating" laws .
You are correct, if the riders are wearing helmets!
Even if the riders are not wearing helmets, motorcycles are permitted on the roads, pedestrians causing traffic congestion are not.
But he was one of the two arrested - which this thread is about.
No my comment, and the one I was responding to, was about just one of them, the one who was pictured in the OP and its link, the one who did the attacking.