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it's hard to make a general rule in this case
some streamers probably care
some others probably don't
This. That's why it's more of a problem really not on the streaming site but rather on the user themselves, Since let's say the streamers does indeed put the block, that's just on their side, if the user side wants to bypass it they easily can so it needs both parties really to adhere to the rules. Though I'd say rules are dead on the internet since, well, it's the internet. I'd really suggest that they just rather teach it themselves to their kids, better informed than ignorant since ignorance breeds curiosity after all, and would only lead to falling in deeper I say.
well we'll find good people and bad people in ALL areas, everywhere
sometimes the situation is not obvious as well, or the person thinks they're doing good and they're not in reality, many possibilities
I could agree with you that the internet can be a bit like the wild west sometimes in terms of rules