This is total nonsense. Most western legal systems already require websites to be compliant with accessibility guidelines. The Equality Act in the UK has much

This is total nonsense. Most western legal systems already require websites to be compliant with accessibility guidelines. The Equality Act in the UK has much tougher provisions, and has for a long time under the Disability Discrimination Act before it. British business has not collapsed under the weight of supporting it yet. If you're really struggling to make your website compliant then you can go on the government website and it even tells you the appropriate guidelines. In addition, the W3C publish their own sets of guidelines for you to follow. For Add-Ons, you have Fangs to show you how a screen reader sees your page. There are simple tools that will tell you if there is sufficient colour contrast between your text and background.