"I want your supervisor here"
I've had someone say this to me, when giving them a ticket for having all three of their children completely unsecured on the back seats. They declared that I was a liar and that they wanted my supervisor to attend immediately. I politely declined to have my sergeant come down to the scene of what was just a minor traffic stop, but explained the complaints procedure and that if a complaint was made it would be reviewed by a supervisor anyway.
My question is: is there any obligation when a member of the public asks for a supervisor to be present to get one to come to the scene and speak to them there and then? I struggle to see what it might achieve that couldn't be resolved in a phone call at a later point. In my view, the person seemed more interested in trying to have my decision to issue a ticket overruled than anything else.