Hi Denti,

this is now a requirement under the new EASA regulations. Checkout part CC.TRA.225 -

"4. Passenger handling and cabin surveillance:

4.1 the importance of correct seat allocation with reference to aeroplane mass and balance, special categories of passengers and the necessity of seating able-bodied passengers adjacent to unsupervised exits;"

Several years ago my family were allocated emergency row seats at check in. My youngest who was about 7 at the time was understandably a bit young to be sat there and the cabi crew got us to swap seats (wouldnt let him move by himself) for take off and landing.

the supprising bit was my 13 year old (rugby playing) son was also moved away from the emergency exit row yet they allowed a VERY old man who needed a stick to even stand up to remain right next to the exit. Now I am not a betting man but I would have put money on my son opening and being out that exit before the old git even got his seat belt off.

Onur air was the airline involved.