Most decent able-bodied human beings out there don't even have to think before offering their seat on the bus to an elderly person or someone with a disability. It's one of those basic unspoken rules in society that everyone ought to understand. Of course, there are always people who won't get up for one reason or another, whether out of sheer absentmindedness or maybe just not giving a shit, but it's pretty rare to experience someone so entitled that they actually have the audacity to ask a pe…