Why shouldn't they have the option to reject the ride? What if they're allergic, or deathly afraid of dogs? I have a friend like that. Anything bigger than a chihuahua and she'd probably flee the vehicle before driving it anywhere.
Being able to reject work you can't handle seems like the one silver lining of being "independent contractors".
Being able to reject work you can't handle seems like the one silver lining of being "independent contractors".