People connect to the internet and do bad things (or have bad things happen to them)

They need to pay a service provider to have the capability to do bad things (or be exposed to bad things)

Why can't we just ask/compel the service provider to identify these people (or block the bad things).

For any politician the line of thinking will be something like that. It comes off as incredibly long hanging fruit that would have broad positive impact for the whole of society. Like the apple in the garden of eden, just walk over, take a bite, and you'll be a political hero without having to do much work at all.

> Why can't we just ask/compel the service provider to identify these people (or block the bad things).

Isn't that basically what's happening? Service providers, such as Discord recently for example, are asking for identification to prove users are of a certain age. If you punish service providers for providing services to minors then they will need to do age verification.