Examples of subjects that are off-topic (and which moderators might close down) include recent advances in artificial intelligence and machine learning,

This is kind-of surprising. I get that you want it to be an AI safety research forum rather than an AI research forum, and that's reasonable but I think this wording could put off lots of fairly safety-friendly AI researchers from participating in conversations that are mostly about safety. Don't you want to be at least a little bit inclusive of AI researchers? Maybe what you're going for is something like: "discussing advances in artificial intelligence without connection to formal safety measures"?