On RyanAir Dublin to Brussels the flight attendant had to police the exit row to make sure all passengers were at least 18 years old. There was a huge group of French speaking Belgian teens on-board, many of whom tried to sit in exit row. I was one of the first on-board, and had nicely settled into my exit seat without any questions. As the kids came on board the flight attendant had to ask each of them their age and check ID. After about 5-6 guys he looked at me and rolled his eyes. I winked. 18 year olds are such a pain to deal with.