One good way to go about this is to temporarily hide the identity of the author and reveal it only after their work/creation is reviewed. For example, a platform like this could be configured in a way that once a new idea is posted, the author is not visible, instead of their picture/name the question mark would be shown.
Once the visitor reviews the idea, they're asked to rate it or give their opinion about it in other, more subtle ways. When the idea page is opened, the system would display a pop-up notification which would read something like "if you want to know the identity of the author, please read and review the idea first". Once you gave feedback to it, the identity would be revealed.
Alternatively, at the end of the idea/session page, there could be a "reveal identity" button that the user could press without giving feedback. Since it would be at the end of the page, it's unlikely that they'd scroll to the bottom first just to know the identity and only then read the text.
Please leave the feedback on this idea
Please leave the feedback on this idea
Please leave the feedback on this idea