Ya and it would just show there performance and what you would need to beat it. Also, it might give some of the new members who are also achievement junkies, a reason to come back. Though I am not sure we might those types of people. What do you mean by clutter?
If its really a bad idea then just ignore the first three trophies and keep the idea for the "Top Poster" trophy, which is really why I wanted this, I just threw in the other ones to grow the idea.