You shouldn't be directing your ire at your other passengers. The responsibility for this lies squarely with the airline, which knows full well about mean femur lengths and mean hip widths, and consciously chooses seat configurations guaranteed to be uncomfortable for a large fraction of their passengers, in order to squeeze more profit out of each flight.
If people make a fuss, and demand laws or government regulation for minimum dimensions of passenger spaces, that will establish a minimum floor on flight prices, but it will also ensure that everyone can be accommodated equally. If it's a race to the bottom anyway, it might be a good idea to build a floor at a reasonable height above rock bottom. Short and narrow people can then resent taller, fatter people for raising their fares instead of tall people getting angry about reclining seats.
If people make a fuss, and demand laws or government regulation for minimum dimensions of passenger spaces, that will establish a minimum floor on flight prices, but it will also ensure that everyone can be accommodated equally. If it's a race to the bottom anyway, it might be a good idea to build a floor at a reasonable height above rock bottom. Short and narrow people can then resent taller, fatter people for raising their fares instead of tall people getting angry about reclining seats.