Function: Invites a friend to join a group via a POST request.

Function: Un-favourite an activity via a POST request.

Function: Fetches an activity’s full, non-excerpted content via a POST request.

Function: Deletes an Activity item received via a POST request.

Function: Deletes an Activity comment received via a POST request.

Function: AJAX spam an activity item or comment.

Function: Mark an activity as a favourite via a POST request.

Function: Processes Activity updates received via a POST request.