A few people tried to add scam and porn sites, but because it all gets passed through gpt I can mainly rely on openai to reject anything too bad

You can’t rely on OpenAI for moderation. Your site will happily generate a script tag that fetches offensive content from another site and render it. OpenAI won’t know that the remote site has offensive content.

Anyway, just keep an eye on it as you’re essentially running a static web host and someone will always try to ruin it for the rest of us.