Bug report: Internet Explorer WP7

The website deckbox.org contains an ugly announcement when I browse via Internet Explorer (IE) of my Windows Phone 7 (WP7). It is said that my browser is antiquated and that I should change to Mozilla Firefox. Unfortunately, Microsoft does not offer Firefox for WP7.

Here comes my request: Is it possible to adjust the website so that I will no longer get an announcement when I browse by via IE?