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Yeah, in the cybersecurity space it's a lot more prevalent. TLP:CLEAR, if you will.

He's a security practitioner.

You know what an ISAC is. It's a meetup of beardy mid-level security managers from huge companies.

I'll save myself some embarrassment and say that I just didn't know that ISAC was the collective noun for that :-)

If you see something publicly it's TLP:White (or clear, since it was changed for weird readons) by definition. But yeah it's a term specific to it security, where it's usually well understood what TLP:Amber and TLP:Red means. I agree TLP:Green is a bit more fuzzy, and the intention is often basically "share with trusted parties but don't post publicly".