I find this silent lunch thing....really bizarre.
At my son's school (in Oz), they have a five minute fruit snack, then 20 minutes for recess and play, then 35 minutes for lunch and play. During recess and lunch they have to eat before they can play, so if they talk they may miss out on the fun. To force a child to not be able to talk sounds like torture!
It is a little odd , we never found it up north either , we just moved to this southern state a year ago and we heard about 5-10 minutes silent lunch was odd too .
The problem with me is , i think the punishment doesn't suit the crime . Because when you talk during that 5 minutes silent lunch , the punishment is losing whole recess next day which is 30 minutes . And i thought this punishment is really ridiculous . Now if you fight with other students then you lose recess , now that punishment suits the crime . I just don't understand it . I am requesting a meeting with the principal , but i haven't got any reply for it yet .