Earlier quoted context omitted.
Bad actors are on those mailing lists too. What you describe would be the equivalent of mailing fulldisclosure with "Hi all, there might be more unregistered nameservers at .IO (or another 101domains-serviced TLD) that could be used to attack live traffic if anyone wants to grab those, kthx"
I'm fine with that happening, because the people who run .IO need to be spanked. If their customers are subsequently unhappy that their domain names have been hijacked, they can take it up with whatever corporate entity runs .IO. Same problem as publicly disclosing serious flaws with an SSL/TLS root CA.
Strategy is important.