At least in Europe, budget airlines (and not only them), during online checking, purposely assign seats rows away for people on the booking, if you are not trav

At least in Europe, budget airlines (and not only them), during online checking, purposely assign seats rows away for people on the booking, if you are not travelling alone. You have to pay additional fee to be seated with your cotravellers. Many people don't take this option. Now, imagine emergency evacuation situation. Most people will gladly dump the luggage, laptops etc., but would you leave the plane, knowing that your wife, kids, mother-in-law (maybe not a good example) are few rows behind and you are not sure if they are Ok. No, you will stay, trying to help them and create congestion. Unfortunately, it will take an accident listing this type of "stupid" behavior as contributing cause for fatalities, in order for legislation to prevent the moron MBAs that decided to monetize their seats, extorting people to pay more so that they can sit together, to stop doing this.