Bryan Johnston's definitions

thiefer

One who participates in an involuntary theft or passive theft;

Thiefery is an action of theft without intent to deny the rightful owner of something of value or with the implied consent of the rightful owner;

An action of theft which provides benefit to the rightful owner;

Any action of theft with the implicit or explicit approval of the rightful owner.

A thiefer doesn't actually steal anything.

by Bryan Johnston February 11, 2008