Everybody makes mistakes, that’s what makes us all human. But like most things, some mistakes are funnier than others. So when you see mistakes happen, it is important that you decipher for yourself what type of mistake it is, so that you don’t embarrass yourself with your response.
This would be the perfect example of when to laugh at a mistake that someone has made, just not to their face. Spelling mistakes aren’t generally funny, because they can be offensive to the person who did it. But something like this needs to be spoken about.