This site

[Housemaster]

I'm not a great user of forums anyway, so I have no problem with this one in particular. I do like to correspond with others but I like it to be about the realistic punishments, preferably factual, that interest me and not the broader topics that forums tend to attract. So maybe you're right that some of us have effectively formed small private clubs of a sort even if there wasn't a deliberate intention to be exclusive.