I've disabled certain activities that we do not want to keep track of (Record merged, for instance). Yet, when I merge a record, the activity is still automatically created. How can I prevent this from cluttering up our Activities tab in the future?
Since that activity type is sort of a system type and is marked Reserved to discourage editing it, I don't think there is currently a way. Since you must have disabled it in the database outside the UI you might be ok with a workaround involving some coding. You might be able to write a little extension to use hook_post to delete activities of those types after they get created: https://docs.civicrm.org/dev/en/latest/hooks/hook_civicrm_post/