Is This a Joke?

The picture shows http://cesa.iust.ac.ir when viewed from Firefox (and other non-IE browsers). The text reads "For better viewing and more security, please view this website using Internet Explorer."

We have to use this website to download the practices for some of the university courses.

I get angry when I see some people who hardly know anything about web design (this is apparent from the first time you visit the website) claim such things about "security." Of course, the implementor of the website is not concerned about our security (if he was, surely he would not recommend using IE). He only wants to use Internet Explorer's non-standard features instead of the world wide accepted standards and using a free software equivalent (IF the website really needs those features, which I doubt about it).

Non-free software bothers, non-free "standards" ruin.