While I can't speak on the legal aspects, being a professional webmaster I can add something to it. I took over the web portfolio of a government agency in WA some two years ago, who's websites were woeful and had not received significant maintenance since they went in place.
Since then, I have completed one site overhaul (the corporate intranet), and am mid-way through fixing our public website. I would have liked to complete these tasks well before now, and the only reason I finally received the funding and approval to do it was because we employed a receptionist who is legally blind. It took a blind person to come and work for us before we made our sites accessible - necessary to do but shameful that it only happened because of this.
I wouldn't characterise the litigant as vexatious, just someone who maybe has a little too much time on their hands to test 30,000 websites for accessibility. I simply think he's out to make a point and try and raise greater awareness of website accessibility, albeit not in a patient and gentleman like manner as displayed in
Maguire V SOCOG [2000].
The core problem here is that as a community, Webmasters, designers and developers think of usability often as an afterthought when creating a new site, if thought about at all. As a community, they have not had it drilled into them the importance of inclusive design, nor have they as a whole learnt and remembered the lessons of Maguire V SOCOG.
As a consequence, those who have some form of impairment that affects the use of computer equipment are unable to effectively use websites to an appropriate level.
Also, the likelihood of any financial gain from a result in their favour would be small since it would have to be shown there was a direct and significant financial impact on himself and his inability to use the website.
The airline provides alternative contact channels by way of a phone number (thus rendering him able to achieve service), and specifically notes that those with special needs must book through there anyway.
Back to the airlines, IMHO it boils down to increased and improved online service = increased margins = increased profits.We all know that business transactions where a human from the company is involved increase the cost per transaction eating into the margins from the sale. If their website is as claimed inaccessible to those with sight impairments, all their doing is increasing the cost of doing business with this customer segment unnecessarily.