[K12OSN] Another question about groups

["Jim Kronebusch" <jim winonacotter org>]

Title: Message

Is there a reason for each user having a group named after them and assigned as a primary group?  It just seems like this really clutters up the list of groups for what looks to me like no reason.  If there isn't a pressing reason for this can I assign a different group as the default primary group for new users?