Generation Xerox as a Justified Trope
To a certain point, this trope can be a Justified Trope. If the parents send the kid to the same school as they themselves went to, then it's not such a stretch to believe that the son or daughter will encounter the same people. If the parents kept in touch with their old friends, it's not unlikely that the child will befriend the children of those friends. However, if the parents moved to a different country, assumed secret identities and tried to forget the past, only to have Junior come home from his first day of school announcing that his dad's right-hand man is his English teacher... that's a bit more of a stretch.
