setfacl can kill a drive

[Steven Penny]

On Thu, Apr 9, 2015 at 2:43 AM, Corinna Vinschen wrote:
> It's a result of ACL inheritance and before the changes to Cygwin's
> ACL handling, you wouldn't even have seen it.

If someone runs a dangerous command such as

    setfacl --remove-all /cygdrive/c

Or

    setfacl --remove-default /cygdrive/c

Can this damage be undone without reinstalling Windows?

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