Hear hear BluePlatinum... I have had it to they eyeballs of having to fix check-in fcukups re: exit row requirements... I can point the finger because I have worked check in (another life!!) and would never dream of putting someone's grandma (let alone my own even tho she is pretty healthy for her age) into an exit row. The attitude of 'the cabin crew will sort it out' is NOT acceptable... we are meant as a last resort for exit row mistakes, not as the primary means of deciding who sits there.
And for the passengers (admittedly only a few) who complain they are being 'discriminated against' for being refused theses seats- all I can say is, TOUGH LUCK!! These seats are NOT BUILT FOR COMFORT, How many times do we have to say it?!?!?!