When you browser sniff & block any browser that is not IE 5/6, you will still block IE
Link has Screenshots (https://hourly.deploy.com/AMF/webapp/index.cfm is the site with the broken sniffer, the same sniffer is on hundreds of other sites)
Why Open the Web?
Despite the connecting purpose of the Web, it is not entirely open to all of its users. When used correctly, HTML documents can be displayed across platforms and devices. However, many devices are excluded access to Web content.