History has shown that if you join an intelligence service, you basically forfeit your right to a fair trial if anything ever goes wrong.

Your potential future opponent can make anything secret and off-bounds that you want to present in court, has unlimited funds and no qualms to invade your private life and present anything bad about you, has unlimited funds to haunt you for the rest of your life, and has no conscience except to preserve itself, even if it was in the wrong. I've also got a hunch that their culture is not "let's all chill and find the truth" but has more of a clan-like "you're either with us or against us" vibe. And this organization has guns, lots of guns.

So in effect, it's a bit like joining the Mafia.

Considering this, one has to wonder why anybody would ever join such a service.