You should not judge people for not giving the seat up, he may have actually needed it more. I have been in the position where I have been sitting in a priority seat because I had chest drains in after major surgery and have been glared at by a pregnant woman. I could have explained why I was sitting in it but would not want to announce my personal business on a packed train. Anonymous on here is one thing, but my private business is exactly that. This man may have been in the same position.