Good-Person
Captain Junkie
The customer may have the interest of the business at heart and not hiring them because, just like you said, a passenger shouldn't be working for a transportation company, seems wrong to me. It doesn't make a lot of sense as the interest that one can get from it is all that matters.
There are many people who have been customers of many big companies like McDonald's. They may be using products manufactured by popular companies like Microsoft as well. However, there may come a time when they may be applying for the exact same company as well.