How to protect usernames

The author archive page URL betrays half of the information you need to access the WordPress backend ~ if I hover over an avatar, I can see the login names from all my users are publicly visible.

To avoid this risk I would prefer that they weren’t but alternatively I am trying to use the “User Slug Hider” plugin which changes all author page URLs from e.g. www.example.com/author/admin to a 16 digits coded strings like www.example.com/author/e9e716def73f76ac. The codes are generated automatically and its impossible to make conclusions about the user names. The WordPress default URLs will cause a 404 (not found) error.

1) are you using a non-standard system call to create those links in AskBug?

2) if so, could you switch to the standard system call?

3) if not, could you give me some other way to hide the usernames?

Terence.