Until they were deleted, your question had net 0 votes and your answer to that question had net -1 votes. To get Peer Pressure badge, your post must have -3 votes at least.
Now I wouldn't encourage you to get this badge by making low quality posts. That badge is something that must not be a goal of anybody here. If you're into badges, there are plenty of them which requires positive contribution to this website and are easy to get. Ideally, we hope that users contribute to this site without explicitly aiming for badges only.