The worst thing you can do is trick someone into using their conscience to cause harm.
This not only causes said harm but also undermines the person’s moral sense, their trust in their own moral feelings. To say nothing of their trust in others.
This sort of mental jujitsu attacks the victim in the most important part of their mind, the part that guides them forward in a good direction.
Our ability to tell the difference between wholesome and unwholesome mental states is one power we never want to lose and never want to harm or undermine in others.
Examine closely all appeals to your conscience. Each one must be analyzed for hypocrisy, mendacity, who really benefits, and what the long-term consequences would be.