I want to keep it free and accessible as a free speech relay. I just don't want it filling up with Gigabytes of porn links and other such nonsense. Switching NIP-05 verification to 'enabled' in config.toml filters out most of the most egregious spam. It's easy enough to get NIP-05 verified and a lot of clients will do it for you. But spam bots usually aren't NIP-05 verified.