Every reason NOT to make the backstory then... Sometimes, you just need to list it out as, "Wilrow Hood was one of many citizens living and working in Bespin's 'Cloud City'. Like many others, the news of the Empire setting martial law on the city prompted him to go into a panic and attempt to escape."
The Databank on SW.com can be complete with entries like that. You could list every character seen, and not all of them need a heroic background regardless of how boring it may be. It's not like anyone's needing prompted to read it afterall, as it's free. EU really eats it sometimes.