[@neon67 Participant 5 years, 9 months ago]

try to css:

#bbpress-forums .widget_display_replies img.avatar, #bbpress-forums .widget_display_topics img.avatar, #bbpress-forums div.bbp-template-notice img.avatar, #bbpress-forums p.bbp-topic-meta img.avatar, #bbpress-forums ul.bbp-reply-revision-log img.avatar, #bbpress-forums ul.bbp-topic-revision-log img.avatar
{display:none !important;}