RECOMMENDATION: In case of Activities with associated responses or reports, consider hiding, rather than deleting, when no longer needed.
As a consequence of hiding, an Activity will be removed completely from the Activity list (unless the 'Show hidden Activities' funtion is enabled), and related submits and records will not be displayed either.
However, this can be reverted at any time by unchecking the Hidden option under Edit Activity.
See How to Hide an Activity for details.