I won't be participating in FUD here. Of course, we have some bad apples on the network. Do I give a shit? No. I can mute, block, and report accounts. Reporting means that when a limit is reached most relay operators will not host the npub. Or a relay runner can see the reports on the account and not allow them access. That's the way I think it works at least.
Anyway, do I want to see child porn on here? No. But, I have the power to have the network serve up what I want to see and deny stuff I do not want to see and that is the best superpower of Nostr. People can still say things and I can choose whether to listen or not. And I think this is very important.
We cannot have centralized entities moderating what people see on the network. That's the user's choice. But, hey, the cool thing about Nostr is that if you want to; you can start a relay and build a client and allow whatever you wish to run through it or not run through it. You can build that family-friendly Nostr client.