BuddyPress.org

While this is an elegant hack, it just occurred to me that this is not optimal if you want to preserve an individual user’s ability to check blog comments in an activity stream. If I read the code correctly, it prevents blog comments from triggering an activity update in the database, so blog comments never get recorded as an activity.

If that’s true, then it would be preferable to still RECORD the activity, but simply not DISPLAY it in the activity loop. Unfortunately, from this codex tutorial, it seems like the “filter” options only allow you to SHOW one type of activity (rather than filtering OUT one type of activity):

https://codex.buddypress.org/developer-docs/custom-buddypress-loops/the-activity-stream-loop/