Virtually every major online platform and service today started with a similar idea. They gradually accreted more rules over time because human beings do crazy, unpredictable things, and then masses of others object to what they’re doing.

Things like:

Organizing large groups of users to harass others because of who they are or what they’ve said.

Spreading misinformation that causes active harm.

Flooding conversations with marketing spam.

Posting violent or explicit images that virtually no one wants to see.

Or just saying hateful, hurtful things that most of us would rather not hear.

Faced with such behavior, most platforms evolve rules according to the preferences of their owners and their communities.