BuddyPress.org

ok, i found some delete references on the activty comments that do not have any sort of filter on them (actually this goes back to a trac i need to file – https://trac.buddypress.org/ticket/2530 )

under the functions:
bp_dtheme_new_activity_comment() – ajax.php
bp_activity_get_comments( $args = '' ) – bp-activity-templatetags.php

Otherwise everything uses the same activity template