[forgottenpass]

it barely happened here with membership in the thousands. It would be an interesting social experiement to replicate that on a larger scale while limiting the demographic by gender, age, and so on to see how it affects the behavior of the group.

If you want the results of that experiment, you'll find it in the conventional wisdom among reddit moderators and dedicated users. Subs with under 10,000 subscribed users are not only good interpersonally, the content of the subreddit is in it's heyday. If the userbase balloons, or the content quality nosedives, then you get bad interpersonal interaction.