Passive aggressive would be not saying anything about it. That's not mutually exclusive with this. You can tell the PM, I disagree with you for these reasons, I

Passive aggressive would be not saying anything about it. That's not mutually exclusive with this. You can tell the PM, I disagree with you for these reasons, I'm going to build it the way I think is right, and if you need something different, go find someone else to build it. What else would you do if your PM wants you to build backdoors into your encryption, for example?