text: Reading other peoples emotional expressions without permission can cause the person to get angry because they might not want others to know how their feeling. I think it would be better to see how the person is acting and if you see that they aren't acting the way they usually do then you can ask them how their feeling or if their okay instead of using technology to read someones emotional expressions. For example, in the text in paragraph 5 it talks about how you can tell how a friend is feeling by the look on their face. Some people don't like others knowing how their feeling because they might think that the person is going to go off and tell others. They might be afraid that their going to make fun of them.