Re: Section 31 is a positive for the Federation (spoilers from TV & bo
TNG's "Insurrection" with Admiral Doughtery sanctioning the removal of the Ba'ku to get technology for the regenerative properties of their planet and using cloaked Federation ships and working with a known Dominion ally during the Dominion War.
I always got the impression the S'ona joined up with the Dominion as a result of the Insurrection incidents.
"I was never a Star Trek fan." J.J. Abrams