My favorite comment on the article:

This is not a virus...
You have to enter your password to install it. This is not a failure in Mac OS X. Only a very bad operating system would NOT have a security hole like this, because a good operating system should allow the user to install programs that do just about anything. This is just a program that the user has to install and enter an admin password to install. It is an A-1 example of a PEBKAC error.

You can be as secure as you want, but you can't secure against user stupidity. :)

Man, if it's that dependent on user idiocy, it's A) not my problem and B) custom made to mess with Mac users. XD

The smug is mighty thick today! Don't worry, it'll clear up when you download this special countermeasure, run it, then enter your username, password, and bank account info.