More a wwyd
I am on a train and some passengers (myself included) reserved seats in advance but the reservation tickets haven't been put in place.
Most people have been good natured about it and found seats near their travelling companions. I am now in "my seat" as the gentleman who was there has got off the train so hopefully I won't be told off for being in someone else's!
Problem is the train is now filling up, a few passengers are standing and there will no doubt be more after the next station. Would it be unreasonable to expect passengers who have not reserved to give up seats to those who have?
As for why the reservations weren't put on in the first place there may have been a good reason and I'm not in a position to hazard a guess.