This depends on a lot of things, such as what the illegal activity is, whether they were told to do it, whether they knew it was illegal, and so on.<p>In this case, it&#x27;s a product sale regulation. It&#x27;s not illegal to <i>manufacture</i> non-compliant engines, but it&#x27;s illegal to <i>sell</i> them. So in a world of individual-only responsibility, that would make the individual sales agents who performed the transactions with customers liable. I don&#x27;t think that&#x27;s an improvement.<p>(This answer may change if the sales agents know or should have known that the product was not legal to sell; this definitely applies to e.g. sales of alcohol to minors)