Of course, Starfleet could take a super tough stance like George Bush Jr. and say something like:
"Those who are our enemies, and those who support our enemies, in any capacity, will be dealt with swiftly!"
Mind you, that is not a direct GB quote...just a gist.
If the Ferengi Alliance is smart, they would immediately separate themselves from those renegade Ferengi who would bring the Alpha Quadrant to ruin. The renegades who are providing tactical/strategic information to the Dominion would then be on their own, with no support from the Ferengi Trade Commission. And if the Ferengi wished to stay in the Federation's good graces, the FTC would be quick to point out just who those renegades are. "They went thattaway!"
And of course, Starfleet would send a couple of Akiras to smash the renegades' marauders to so much space dust, and capture the Daimon's and their crews. Then comes the question of POW's, and perpaps repatriating such vermin to the Ferengi Alliance. Or, the Federation could try the Ferengi renegades as full fledged spies. Better yet, let the Klingons try them....at least, they seem to have DEATH PENALTIES for spies. HEE HEE HEE!
Respectfully,
General Chang
"So the Enterprise is on her maiden voyage, eh? Now that is one well endowed lady. Ah'd like to get mah hands on her ample nacelles, if ye'll pardon the bit o' engineerin' parlance." -Scotty, STAR TREK, 2009