The example that got this started a few posts back, OP had already moved once to accommodate somebody, then he was asked to move again to accommodate a father who wanted to sit by his daughter. The daughter turned out to be not 4 years old but 40, then the father slept the whole flight anyway. Really too much. Too many people thinking it is always OK to ask as long as you ask nicely. If you wear the big boy pants, you'll accept that sometimes it's your luck not to get the seat you want and not bother someone else with your problem. Different for a parent separated from a child, or a couple on their honeymoon, and various other special situations.