"For the Uniform." Sisko going and poisoning a whole planet to human life (and perfectly willing to do it to lots of others)? "Red Alert" Worf even hesitated to do it. That in itself is enough for this thread, but we also have the tit-for-tat that Starfleet doesn't usually get involved with.
And then Sisko gets off without further comment, let alone repercussions.
I liked it, and think it's justified (and apparently Starfleet does, too), but it was clearly a way to shock the viewers, because this kind of thing doesn't happen in Trek