You shouldn't blindly implement features just because your users are telling you to do so. While it is important to listen and react to your user's concerns, it's also your responsibility to maintain the integrity/consistency of the application. Also, if you don't believe that the feature you're building is going to have any effect, then it's already heading towards failure because you're not going to be committed to its success.

I agree with jkush -- if you don't agree with the user, you should engage the user and see if you can get the feature to a common ground that you can agree with.

Also, if your feedback loop is just an email, maybe you should add a forum to make the loop more interactive.