Don't worry about these children. They have no concept of what freedom of speech actually means. Some of them may not even be from a country that allows for such speech.
Kids today believe freedom of speech only applies to those they agree with and think that anyone who doesn't speak the way they do should be banned from the platform we use (imgflip, twitter, etc...).
The right to free speech also applies to hate speech, even if that speech isn't really hate speech.