Difficult subject this.
I do agree that goverment sites and large e-commerce sites could be more disable friendly but to expect all and everyone to follow this rule is just plain dumb.
I do various jobs for schools and let me tell yer, alot of them are NOT disable friendly i;e no lifts ramps etc.
The reason which is harsh I know is that it is not cost effective to the local council.
Now you'd think them of all peeps would be throwing money at schools to comply with various diability laws but they just ignore it.
I think the same will happen to internet sites as well unless some high profile sites are taken to court.
I'm not against disabled people at all but there is only so far companies and individuals are willing to go to accomadate them.
The needs of the many outweigh the needs of the few.