That’s cheating their company (and/or setting up for tax evasion), which in my experience is far more common than cheating the customer with a detour, at least

That’s cheating their company (and/or setting up for tax evasion), which in my experience is far more common than cheating the customer with a detour, at least when the customer is local (you can show your localness through verbal cues implying or simply indicating you know the route).