Originally Posted by Kjølen
Darth Bane would be disgusted with you people.
The Sith went into hiding by necessity - they'd been all but wiped out by Lord Hoth's Army of Light - they wouldn't have stood a chance in open conflict with the Jedi Order.
So, they waited and watched, pulling the strings until finally, one of them would achieve the power they had long sought. They got much further through deception and 'sneaking' than they ever did through open conflict.