Hiding the 'delete' link from members on all Activity pages.

Hi all,
I have edited the filter on bp_activity_delete_link in bp-activity/bp-activity-templatetags.php in order to hide the delete link on activity from anyone but an admin (I want to stop members being able to delete anything they have contributed) which seems to have removed the delete links for non admins in both the sitewide activity page and group activity but I can’t seem to track down where to filter for the activity on a members personal profile.

Do you have any ideas where it might be and am I still looking for bp_activity_delete_link?
Thanks
Ross :0