Originally Posted by
Vogonjeltz
ad_hoc didn't say, but it's implied, that the player was wrong to ignore the Barbarian class concept that offensively in the first place.
The class entry literally states: "People of towns and cities take pride in how their civilized ways set them apart from animals...to a barbarian, though, civilization is no virtue.... Barbarians are uncomfortable when hedged in by walls and crowds. They thrive in the wilds of their homelands: the tundra, jungle, or grasslands where their tribes live and hunt." (PHB 46)
Creating an Urchin Barbarian and saying they come from the Big City, love going to hoity toity parties and adore as many people as possible in a room is literally the opposite of what a Barbarian is in D&D. So yeah, if you do that, you're doing it wrong, there's no two ways about it.
You can do it if your DM agrees, and that's fine, but you're wrong. And it's fine, nobody outside your game will care...but if you insist that you're doing it correctly, you're wrong.