Being a web designer myself, I know that the extra work to get websites to work in IE is annoying… Microsoft is fragmenting the Internet with their web browser that is heavily used by the government, companies, and other places that do not allow users to install additional browsers.
The way Kogan decided to go about it is great! They display a popup message to IE users explaining to them the problems with their browser. Not only do they explain the problem, but they offer four solutions: Google Chrome, Mozilla Firefox, Apple Safari, and Opera. I think that the “Internet Explorer 7 Tax” will help users better understand the problems outdated browsers cause web designers.