Mmm, there is an Elisabeth Mackey working for NIST, and a Ryan Mackey working for NASA. Ryan Mackey has written a debunking of David Griffin.
So the member here, R. Mackey is presumably Ryan. Your quote comes from here:
http://www.internationalskeptics.com/forums/showthread.php?postid=4865245#post4865245
(It would be nice if you provided such references yourself).
Of course, you didn't cite all of his post, which, on the whole, is quite dismissive of your idea.
Hans
I wrote a more detailed explanation of the non-explosiveness of nanothermite here, after additional time reading the literature on the stuff and listening to Truther fantasies about it.
I also have no relationship with NIST beyond a handful of e-mails traded with some of its researchers over the years.
Not that it matters. Propulsive devices in WTC 7 is an even stupider concept than explosives. Some ideas are so ridiculous that they preclude intelligent commentary.