Maybe in the future someone catches Section 31 so they can't attempt genocide anymore...
They are finally brought to justice by the 25th century.
The existence and activities of Section 31 were exposed to the general public by the early 25th century
and its agents brought to justice for their crimes. The public release of Section 31's files and records ended over 300 years of the bureau's illegal and unsanctioned black-ops and infiltration programs. (The Good That Men Do
I hope we actually get to see this in a future novel.
This, and the public trial, treason conviction, and possible execution of every single member of Section 31 that the Federation can get its hands on.
I think it's safe to say that the United Federation of Planets does not engage in capital punishment anymore, especially since they're not so much enemies with the Talosians anymore.
The other thing to keep in mind is that exactly what constitutes membership in Section 31 is a bit, well, murky. I don't think they keep ledgers or tell people what the secret handshake is or hand out membership cards. Julian Bashir, for instance, is apparently considered to be a member of Section 31 by them, and has even undertaken missions upon being assigned one from Thirty-One; does that make him
a member who deserves to be arrested and tried for treason? On the other hand, he's also a part of the Kirk cabal of anti-Thirty-One officers.
Similarly, what about, say, Admiral Ross? He's apparently a member, he's undertaken operations on their behalf, he's collaborated with them. He even
But by the same token, to hear him talk about it in his head, he thought of himself as trying to hold them back and control them.