This particular example is an interesting one. When I ran across it on SU, the first thing I thought (before clicking the title) was some newbie wanted to be like the cool l33t h@x0rs. Then I opened it, read it, saw it was migrated from SO, and said, "WTF?!"
Opening it now again, a few hours later, I see it's getting some really good response. But it's clear that the user was asking, from a programming point of view, how to harden his software. And while 5 people did vote to migrate it, in retrospect I think it was unfairly and unjustly done. I'm not flagging it for mod attention -- but only because it is getting some good answers there.
I do think flagging for mod attention is the right answer in a case like this. But at the same time, in this exact scenario ... How would STRIDE-type guidance for a developer not be programming-related?
SU is not supposed to be our dumping ground!
(BTW, security is a valid topic in all 3 sites -- how to write more secure software in SO, how to protect your network and other assets in SF, and how to protect your individual PC or home network in SU. This one clearly fell into the first bin ... )