is: Why do people think it's appropriate to comment on koryu they aren't part of?

Having watched people discuss the legitimacy of this or that teacher of this or that koryu and whether or not they had permission to do so over the years, it has always fascinated me that people feel they have the right to opine about what is essentially a family matter.

Is it a Brangelina Jenn thing where it's just fun to muck into the gossip?