I was reading Man on Crutches on Train with Camera and, about 2/3 of the way down, some words sounded familiar - I realised they were linking to a comment I made on the subject last April!
That article actually has some really interesting thoughts and information, which I want to look at in more detail when I have the chance. And it is talking about this blog, named People Who Sit In The Disability Seats When I'm Standing On My Crutches, where the creator took photos of those very people. This blog has not been posted on for nearly a year now, sadly. Though I could create my own alternative for Sheffield trams!
Another article I've found is The iPhone Vigilante, about the blog mentioned above. And I also found a discussion board message on the same issue, but in Singapore. This thread is another that I will havfe to read in better detail some other time, but one new idea I got from it is to suggest to Stagecoach that the messages announced through the tram system could include one about giving up your seat for someone who needs it more.
There is a discussion here, a yahoo discussion and a Facebook group, for those of you so inclined!
There will definitely be more happening on this issue, watch this space! (well, this blog at least).