A voluntary exchange may reduce societal welfare if external costs exist. (en.wikipedia.org)
Furthermore, 76 percent of consumers say they would move away from companies with a high record of data breaches and business disruption accounts for 39 % of total external costs. (lawyer-monthly.com)
Having the opportunity to be philosophical, I would say that I support regulations that bring external costs internal — not 100 % sure that is the right way to say it. (allfinancialmatters.com)