As designers we’re not hired to simply do what we’re told. We want to work with clients rather than just for them to produce good work, so you shouldn’t feel scared to question things you’re not comfortable with or that you think could have a negative impact on the user experience.
If you try to always think from the user’s perspective, you’ll be helping the client achieve their objectives in the long run.
Stay away from blackhat tricks like hiding an unsubscribe link, annoying pop ups or tricking a user into signing up.
Through design and through our projects we’re able to have an influence on the experience a person has during their day. Make it a good one.