As a social media platform grows, and its user base becomes more and more reflective of the underlying society it is serving, it will have more and more users on it who behave in ways that the initial culture will not consider "reasonable".
This is the necessary consequence of having less social homogeneity.
Some of that will be because of simple culture clash, where new users come from other cultures with other social expectations and norms. But some of that will be because older users weren't aware they were relying on the niche nature of the platform to just *avoid* antisocial or poorly socialized people, and don't really have a plan for what to do about them when they show up in ever greater numbers, except to leave, only now they *can't* leave, not with impunity, because they're invested in the platform.
So the conflict level goes up dramatically.
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