Accessibility and Government / Official Sites

I would have thought that accessibility would have been a primary concern of any sites run by Government departments, however the CRO’s “security” feature on the company search form seems to make a complete mockery of that.
I am a normal sighted person. I do wear glasses, but I am far from blind. However, I have serious issues making out what the security code is on the CRO site at times. How would someone with bad eyesight or a serious ailment handle it?
It would be interesting to see how many high profile sites are actually accessible. I’m not saying that all sites have to comply fully with the w3c accessibility guidelines, but some sites are even impossible to navigate using a normal browser as their authors seem to think that only Windows and IE5+ exist (ie. ActiveX junk)
Related stuff:
http://eaccess.rince.ie/talks/2003/braillenet-29-Apr-2003/
http://eaccess.rince.ie/white-papers/2002/warp-2002-00/