Well, they charge you by the kilo when your luggage exceeds the specified weight allowance, but don't refund you when you fall vastly short of said allowance.
I recently had to pay �30 to Ryanair for being 2 kilos overweight. On the return journey, my hold baggage only weighed 12 kilos. Didn't get a �45 refund..........
Why don't children over 2 pay less for their seats, if that's the case then? How can they justify charging a 14stone person the same as a 3 stone toddler?