Not all rogues are 100% stealth, Rogue technically includes fencers, brigands, assassins, and dirty fighters of all manner. A two-mace wielding dwarf in leather armor, acting drunk to trick his opponent into making silly attacks seems perfectly fine to me. They're gifted craftsmen and machinists, so why wouldn't they be able to pick a pocket or a lock? They know how to build the lock, and they have to get those stubby hands inside of clocks and gears and stuff, so you'd never know they were in your pocket at all :P