Filling all holes to protect the landscaping is but one requirement of a dedicated detectorist. Thousands of individuals & organizations have adopted a formal Metal Detector Operators Code of Ethics:
"____ I will respect private and public property, all historical and archaeological sites and will do no metal detecting on these lands without proper permission.
"____ I will keep informed on and obey all laws, regulations and rules of government federal, state an local public lands.
"____ I will aid law enforcement officials whenever possible.
"____ I will cause no willful damage to property of any kind, including fences, signs and buildings, and will always fill holes I dig.
"____ I will not destroy property, buildings or the remains of ghost towns and other deserted structures.
"____ I will not leave litter or uncovered items lying around. I will carry all trash and dug targets with me when I leave each search area.
"____ I will observe the Golden Rule, using good outdoor manners and conducting myself at all times in a manner that will add to the stature and public image of all people engaged in the field of metal detection.By Charles Garrett in "Treasure Hunting for Fun and Profit"