How would Riot look at making a thief Champion work in the story?

While some Champions have been thieves in the past (Graves, Talon, Janna, etc.), none of them kept it as a lasting occupation. All of them moved on to what they're doing now. But in many fantasy games, thieves have proven rather interesting characters, or have created factions that lead to interesting story lines.

Case in point: the Thieves Guild from the Elder Scrolls series. In Oblivion, you had to help the Count of Anvil remove the curse of Nocturnal's Cowl so he could shed the identity of the Grey Fox. In Skyrim, you help the Guild get back on its feet after Mercer steals the Skeleton Key, cursing the Guild, and uncover Mercer's role in the murder of the previous Guildmaster. The stories behind those events are quite interesting, really, with great characters to boot.

This makes me wonder if thief stories like that could work in League's universe. Having a Champion whose day job is theft would add something to make the world feel more believable.