Would anyone really join the Sith? If you think about it. The way their government works isn't that much different from North Korea or Nazi Germany, and their religious values closely resemble a stereotypical form of Satanism.
Empire (OT and onward in TOR and other games) was based of off Nazi Germany / Axis, not sure where you got N. Korea from.
For the most part I think I would join them pending on what statis I would be within the Ranks, etc.