I would personally whitelist people with good enough reputation/contribution history. Might get the best from both worlds. Avoiding AI spam while saving time for the core contributors. If they just have capability to use it responsibly.
¹: Often correlating with a marked decline in the quality of their technical writing. I don't know which direction the arrow of causality goes, but I have observed LLM use inducing madness under reasonably-controlled circumstances – different phenomenon, similar principle. I suspect the use of AI codegen systems is causing the reduction in discernment ability, rather than a sudden drop in discernment ability causing increased use of AI codegen systems.