Dear all:
You can block the DNN security scanner from PowerDNN in order to prevent anybody from using it to reveal information about your DNN implementation.
It is very easy, the only catch is that you must be able to make changes to IIS on the server. The solution is to block the address for the PowerDNN site, it is 216.58.236.42 (this is public, easily obtained information). I just did this and attempted a scan, the scanner immediately shows "Could not verify website as a DotNetNuke Website."
Hope this helps those with concerns about this tool until the dust settles about the true vulnerabilities (if any) and possible patches.
Carlos