No person should ever be treated differently just because they look different.
Unfortunately, this is something that happens all the time, among both children and adults, and it is never acceptable. Just ask Ilka Brühl, who was born with ectodermal dysplasia, a rare genetic disorder that affected her facial structure.
The German girl was called evil names in school, and in the end wished for a way to make herself invisible. At the same time, she was a fantastic student, and ultimately realized that she could help others by telling her own story.