> Asking a young folk if/what are they studying is not unfriendly at all. I am the kind of person that engages in conversations with people around me and I have

> Asking a young folk if/what are they studying is not unfriendly at all. I am the kind of person that engages in conversations with people around me and I have a never had a negative experience from that, But perhaps they had a negative experience from your words? If you're a paying customer, their ability to make housing and car payments may hinge on being polite to customers like you, no matter how rude. With power dynamics like that, you can't necessarily know if you've offended them.