As Starr does every time you look at him...
And remember that fake Sith that Flax and everyone was totally fooled by before he knew Starr was a Sith? (If you don't remember, Starr created an illusion to make the others think they - he
, rather - had killed off Cracken's apprentice.)
If Starr can fool Flax...
(See how this illusion stuff goes?)
As for Drago: I thought the Immortals were a race
in Mrear. You mean to say each Immortal has a quest which, upon fulfillment, makes them lose their immortality?
Oh, and something I missed mentioning before: Since when has Taklin killed a Sith? Ever?