Well yeah, but also things like 'don't try to extort their wealth' don't use anything that's from them without permission but if you do use it to get revenge on your enemies you might gain favor. Leprechauns make their money as craft folk; making magic items on commission. Usually utilitarian things like a pot that fills with porridge, a purse with coins, a cloak that defends against the weather, shoes that let you dance with grace and skill. They're not good nor evil but cunning and covetousness is their bread and butter.