Interesting. Seems like the DOD has been aware, but just can't do much about it. They can control how emails get sent from military/government accounts, but they can't influence or filter what others send to them. I imagine it would be diplomatically problematic for the US government to take control of certain sites under the .ml domain without negotiating with Mali.

Worth noting is that some entities are legally contesting the notion that a nation can have jurisdictional rights to a domain.