This tells all users that cheating on rules is noticed and punished without making all rule infractions into major criminal events.
If the sanctions are graduated (Design Principle
5), a user who breaks rules repeatedly and who is noticed
doing so, eventually faces a penalty that makes rule
breaking an unattractive option. While rules are always
assumed to be clear and unambiguous in theoretical
work, this is rarely the case in field settings. It is easy to
have a disagreement about how to interpret a rule that
limits harvesting or requires inputs. If these
disagreements are not resolved in a low-cost and orderly
manner, then users may lose their willingness to conform
to rules because of the ways that others interpret them
in their own favour (Design Principle 6).