@kariboka @km There's almost 700 relays on Nostr. Your account data and ownership is through a "Private Key" that's stored on the relays you use. But once your posts go around, other relays pick it up as well. That's how the data is spread around. As you can guess, there's relays that are hosted specifically by these types of people so they will never get fully banned and many other relays just take data from other relays and host it as well.
Yes, it's pretty much lawless. There's ways on certain apps to label someone as "spam" or "problematic", but it doesn't ban them, only puts a report on their profile that anyone can read.