There is a saying in Bangla: you can judge a dish of rice by examine one piece of it. For people it’s not proper way to judge (most of the time). Then there is another saying, you can understand about the boss by meeting with one of their employee. Is the employee a bad person? The boss most likely would be worse. When the boss is a great person, you will see a reflation in the employees.
For a community, the same sense applies. Does one moderator/advocate turns out rough or nice? The admins are to point- they are the people who keeps it that way.