These checks are often used by employers as a means of judging a job candidate's past mistakes, character, and fitness, and to identify potential hiring risks for safety and security reasons. Background checks are also used to thoroughly investigate potential government employees in order to be given a security clearance.
Situational ethics is a form of consequentialism, though distinct from utilitarianism in that the latter's aim is the greatest good for the greatest number, while situational ethics focuses on creating the greatest amount of love.
So a person who practices situation ethics approaches ethical problems with some general moral principles rather than a rigorous set of ethical laws and is prepared to give up even those principles if doing so will lead to a greater good.