My summation of the article:
"Oh, all that is wrong can be boiled down to an improper attitude about security and a missing complex ACL structure overlayed on the filesystem. Any ACL system, really. This lack of a fun ACL is so critical, I will repeat variations of this about sixty times, just in case you didn't get it."
"Vulnerabilities everywhere else don't matter, as all systems have vulnerabilities. As long as I can get a filesystem with an ACL."
I assume we'll see a whole host of nasty, vicious rebuttals on misc@. I'm glad I use a threaded mail reader so I can avoid it all.