Be sympathetic to their plight, but make it seem that whatever they do, they are actually cooperating with your own desires. That will put them off balance; if they rebel now, they are playing into your hands. The dynamic will subtly shift, and you will have room to insinuate change. Similarly, if the other person wields a fundamental weakness as a weapon (the heart-attack tactic), make that threat impossible to use against you by taking it further, to the point of parody or painfulness. The only way to beat passive opponents is to outdo them in subtle control.
Tactic for passive aggressive?
