I hate that stereotype.
I generally travel first class on First Great Western.
When I'm going out, I generally wear casual clothes.
I may be 15, but you do still get that "He shouldn't be in here! Guard, come quick!" look from other passengers - (this being when travelling on weekdays).
However when I'm working on-train, passengers see me in a uniform, and don't even question the fact that someone who could, quite possibly be perceived as a child, asking to see their £100+ first class ticket!
I am still a child, as stated by law. However, I don't and never have made a "mess" of First Class. When travelling alone I normally plug in a laptop and do some work; with someone else we just have a quiet conversation, (when not in the quiet coach). It really is a rather annoying stereotype. One Thursday during my placement at St. Pancras, i'd just got back from working a HST from Sheffield and was heading home. Going down the escalators there was an elderly woman who had been on the train who was with a man who looked around 30. He asked how her journey had been, and she replied "Oh, lovely, apart from two young children mis-behaving in first class!"
The children in question I had spoken to, just in friendly conversation. They weren't in a quiet coach, but were in First, and had a valid ticket. They were coming to London to visit a friend. Both seemed quite young, a bit younger than me, in fact, around 13. Simply because I appreciate it when I am travelling alone, I kept an eye on them throughout the journey.
I didn't see them do a single thing wrong. They didn't take anything of the complementary basket, when they wanted someone they'd come up to the buffet, and ask politely. When the float ran out of 10p's they offered to change a pound for some. In short, they were doing nothing wrong, yet just because they were in a First Class section they were deemed to be "mis-behaving".
Really annoys me!
Sorry, I know that was a bit off topic.