Good points above- also, Q has said (IIRC, more than once) that the thoughts of who is "good" and who is "bad" may be very up-ended when all is revealed (paraphrasing mightily here obviously).
Good people can indeed be blackmailed or threatened and skeered into doing or at least allowing bad to happen, and bad people can be leveraged in various ways into serving good.
Very good people can easily be used when their families or kids or nation are the hostages.