I was a big disciplinary parent however not sure if I agree with this action. If he disrespected his mom, it stems from not being disciplined at an earlier age. Sadly to many don't discipline kids when they are young. You don't have to spank, yet take time to teach time, place and respect.
Did the same with mine and made them sit downstairs with the "family". They'd ask if they could just take a spanking instead. Nope. But...having them underfoot at that age and watching them sulking around was punishment for me. My Mother used to tell us she had false teeth (she didn't), and that she would take them out and take us to school and escort us inside. We tried to catch her without her teeth and couldn't, so we weren't really sold on the story that she had fake teeth, but we were afraid to find out.