Sure, it could be incompetence. It could also be an intentional strategy to tie up CISA/DHS resources, poison or obstruct CISA/DHS investigations/operations, open up systems to sunlight and journalism, or cause general chaos.
The not-responding-when-notified part makes me think it's not just incompetence.
>The not-responding-when-notified part makes me think it's not just incompetence.
Strong disagree. The person in question probably thought it was a private repo on Github and had a massive deer in headlights reaction when they got contacted. Whoever this is, lost their job, possibly security clearance and more. This was 100% life altering "mistake"/gross incompetence decision they made.