In the current rendering, the exact reputation of <10k users is clearly visible on the mass listings. This allows a centralized/distributed downvote detection, which in turn is in conflict with the site's concept of the ability of casting anonymous down votes on non-Wiki posts.
I have sent a direct mail to the team to evaluate this minor issue (thanks Shog9).
Changed the title based on the conversation with the team.
I reported this minor 'trouble', because I want to avoid any unethical behavior of my frontend users, and especially unwanted bans due they try it anyway. The obvious technical solution is to round the displayed reputation value to the 10s. The social solution is beyond my expertise.