Multilevel caching sounds like a great idea.

I am a big believer in WoT, but I also believe preemptive filtering is a "must have" for many, many users. Not me and not you, but many.

Spammers are already using LLM generated content. They can fail as many times as they like, and one human user only has to fail once for a spammer to get into the WoT for a while.