Resist implementing back doors. That's about the most important way to help others in the long run.
Your example is something illegal and easy to condemn but you are raising a good point about thinking of the consequences of our job. It is hard to balance career with ethics.
You'll have to be more specific than this. Help them with what?
I meant help as in trying to make something good for the society. I can think of doing some free consultancy for a nonprofit, help an open source project for software that helps people or simply tutoring somebody who want to approach the profession from an under represented category.