3. Admiral Marcus Tries To Blackmail Khan - Star Trek Into Darkness
The Decision: Admiral Marcus (Peter Weller) decides to awaken and blackmail superhuman Khan (Benedict Cumberbatch), placing his 72 crew members inside torpedoes which he threatens to deploy unless Khan helps him design ships and weapons that will give the Federation an edge against the Klingons. Furthermore, Marcus aims to destroy the Enterprise, which will be widely interpreted by Starfleet as an act of war from the Klingons.
Why It's Stupid: This choice to blackmail Khan directly leads to Marcus' death later on in the film, when Khan ends up space-jumping to the USS Vengeance and manages to mete revenge, killing Marcus without mercy or compassion. He should've known that screwing with a superhuman who has been in stasis for 300 years wasn't exactly the smartest idea...