We are morally obligated to provide everyone the same tools to maintain and improve their lives.
The Web Content Accessibility Guidelines set out by The World Wide Web Consortium (W3C) are used and accepted globally to create complaint websites. The Federal Government and the private sector both follow acts implemented to facilitate accessibility.
Section 508 of the Rehabilitation Act of 1973 dictates that federal agency need to make their websites accessible to people with disabilities.
The American with Disabilities Act dictates discrimination is illegal in any public space based on any disability. The internet is considered under the law as public space.