I would disagree with the premise of the first post. The Internet could be more user-freindly towards people with certain disabilities, but needs to be? No.

If there are sites you have to use, then the should be legally obliged to meet a certain standard. Sites likley to be of public interest, especially goverment ones, such as the FDA should also meet standards. But there are millions of sites out there. Trying to fix them all would be an endless, and thankless task.