[@robin-w Moderator 4 years, 7 months ago]

untested (as I am on holiday without test server access), but try

add_filter ('bbp_get_reply_author_link' , 'rew_return_null' ) ;
add_filter ('bbp_get_topic_author_link' , 'rew_return_null' ) ;
add_filter ('bbp_get_author_link' , 'rew_return_null' ) ;

function rew_return_null () {
return ;
}

Put this in your child theme’s function file –

ie wp-content/themes/%your-theme-name%/functions.php

where %your-theme-name% is the name of your theme

or use

Code Snippets