When it comes to doing traditionally and conventionally "bad" actions in business, such as deceiving and misleading, Machiavelli would likely say:
Do not do them since they are probably illegal.
Do not do them since people may condemn them as immoral acts.
Do them only if absolutely necessary and do them in a smart, clever, and crafty way.
Do not do them since they are regarded as wrong and transgressions by religions.