Political issues are something which people often talk about. Having such class debates will allow the child to share his views. Children can also find some solutions to the issue. It will also give the child some exposure. It can also be a interesting way to interact and give knowledge to other children.
I like nothing more than a good class debate! It enables us kids to learn more about the way our peers think and understand the importance of learning politics. You could say no considering that some people are immature and can use insults whilst expressing what they think. But if people are fair and mature about it then I think it's a really fun idea for an interactive lesson!