How can I find cacher names that end with an underscore?

Question

In the ‘Friends’ section, these are only displayed as [unknown name].

Is there a plan to adopt the naming convention used by Geocaching.com and make names visible with underscores?

Naming convention used by Geocaching.com
Usernames must be between 2 and 20 characters. Geocaching.com supports the following characters for usernames:
    a to z
    A to Z
    0 to 9
    _ [underscore]
    ä ö ü ë ï ÿ æ œ ß á é í ó ú ý à è ì ò ù â ê î ô û ç ñ å ů č ě ň ř š ž ť ø ď

Answer 1

I can see users with underscore and a few other 'odd' characters, are you sure what you are seing is not due to that users settings on https://www.geocaching.com/account/settings/userprivacy  ?

If they opt out of sharing information with sites like Project GC they are listed as [unknown name] in many places