The io cctld authoritative dns servers are not very competently run. There have also been security issues like https://thehackerblog.com/the-io-error-taking-con

The io cctld authoritative dns servers are not very competently run. There have also been security issues like https://thehackerblog.com/the-io-error-taking-control-of-all-io-domains-with-a-targeted-registration/ https://thehackerblog.com/the-io-error-taking-control-of-all... 'tptacek would add that a cctld that is under control of the five eyes governments is less secure because the registry can be interfered with more easily than .com, though I think that's kinda theoretical.