4chan is dumb. I didn't even know how to sign up that's how messy that site is.
4chan was hacked, email addresses and chat logs were leaked and the service is down. An opportunity for Nostr.
https://www.the-sun.com/tech/14029069/4chan-down-updates-controversial-website-hacking/
Discussion
That's why it has been so secure for so long.
Security by obscurity.
Also spam resistant... No one knew how to get on to spam it... Or was it that ONLY spammers knew how to use it?
You don't sign up. That's the entire point. No email of passwords required anyone can post without giving away their information.