A couple of years ago I got onto a packed train (local light railway service). I was first on as I'd been waiting a while, having just missed the previous train pulling out, so I was on the platform as the doors opened. A man with his DS ran onto the platform just as the doors were about to close and boarded the train. Meanwhile I'd spotted a seat empty and made for it. As I sat down, I heard the man say - loud enough for everyone in the carriage to hear - 'Sorry son, the nasty lady doesn't want to let you sit down'. He then proceeded to tell everyone within earshot that 'It must be race a five year old to the last seat day'. The kid started to cry because he was oh so hard done by, and the father ostentatiously comforted him.
I have rheumatoid arthritis and needed to sit after standing for so long waiting for the train. My disability is more or less hidden on a good day, but on a bad one - as that day was - I walk with a stick. And I'm incapable of 'racing' anyone, even a five year old. To say I felt humiliated is an understatement. I sat and cried all the way home because I'm a soft shite while he continued to comfort his son and bemoan to the carriage the selfishness of some people.
As I got off the train I very quietly and tearfully informed him that I was disabled and needed the seat, and I wasn't a nasty lady, just ill. Also, as he was behind me when I boarded the train, I didn't even know him and his DS were there, much less that they wanted the seat. He put his hands up in a 'back off' gesture and shouted that I needed to leave him and his DS alone or he would call the police.
I'm sure the police would have sped there in seconds to defend a spoiled child and a rude father from the weepy, limpy old bird with a walking stick.