We'll create fresh WordPress site with BuddyPress Edit Activity installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Let your BuddyPress members edit their activity posts and replies on the front-end of the site. You can even set a time limit for how long activity posts should remain editable.
Just activate the plugin, and every activity post and reply will become editable, styled automatically by BuddyPress to fit with your theme.