Re: Isn't it ALL a BuddyPress issue?
You need to distinguish between whether it is a user interface issue, and if it isn’t, where the code/functionality is provided.
For example, BuddyBar is obviously a BuddyPress user interface feature. The code which is called when a user is marked as a spammer is in WordPress. The code that deletes a spammer’s activity from the Activity Stream is BuddyPress.