Appeal to fear
Appeal to fear is when you try to get people to agree by scaring them or threatening bad things—instead of giving a real reason for the claim or the course of action. Fear can motivate, but it doesn't show that something is true or that a policy is best. Threats and scare tactics bypass reasoning. The fallacy is to use fear in place of argument. The right response is to ask: what's the actual evidence or reason, apart from the threat?
Examples
If you don't back this plan, everyone will think you're disloyal and you'll get in trouble.
If we don't do this, we'll all lose our jobs.
Vote for me or your neighbourhood will become unsafe.