ioio,
dont be too upset, there are all kinds of ppl, and i believe , if ladies, maybe they are not married or not a mummy yet, so she will nvr understand or let you have her seat, if men, they can nvr understand, unless their wife is pregnant or pregnant b4. just to cheer you up, there are also very nice ppl ard, i was in mrt once lately, and a young couple actually "reserve" the seat and ask me to sit down, when someone near them got up the seat