I mean, it´s good to get involved! No denying that someone should call people out on spouting this kind of racist bullshit, but I´d respect it more if their respective social environment could do that. And if they live in an environment where it´s A-ok to call someone a racial slur then it´s probably too late and no amount of internet-hate will right this.
If you use Twitter, and these people have publically tweeted terrible things, then you *are* a part of their social community.
There has been a big push online lately to whine, very loudly, about people's freedom of speech.
Post suggestive pictures of underage girls online?
Freeeeedom of speeeech!Post terribly racist things about the president?
Freeeeedom of speeeech!Hound an online female persona with rape threats?
Freeeeedom of speeeech!These are all things which most people find to be objectionable behavior, and the way to address it is not by ignoring it. These people
do have freedom of speech, (unless they are spouting specific and credible threats). But freedom of speech means the government can not, and should not, get involved. It does
not mean that others in their community should not. Freedom of speech does not mean you are free from the consequences of your speech. In fact, if your speech was free from consequences it would likely not legally be "speech" anyways. Freedom of speech is meant to protect language based communication, so that public debate and discussion can take place without the government's interference. As much as someone has the freedom to tweet racist things about the president, someone else has the freedom to call them out on it, and should.
If you grew up in a sheltered and racist place, you may have grown up thinking that this sort of racism is normal and acceptable. But, you have the power as a rational person to assess you understanding, and to change it. They only way these people will realize that this is not ok is if people speak up, and speak up in numbers great enough that it becomes clear that most of us do not think this is ok. Will these people immediately understand why what they said was wrong and have a change of heart? Not unless we woke up in a lifetime movie this morning. But they will realize that what they said is not sanctioned by the majority. Many of them already knew what they said was wrong, since instead of defending it a number of them responded "oh no, I was hacked!!" Over time exposure to other people reinforcing that this is wrong might make some of them change their minds, but for the others it will make them shut up. And the less racist bullshit flying around public spaces the better. First, because it makes the environment safer and more welcoming for everyone and second, because the less there is the less normal it seems, weakening the chances that incoming members (the very young) will see the behavior and adopt it.
As far as calling people's schools, I have no problem with them calling, but the school taking disciplinary action would probably not be appropriate in most cases. There were some students who, as a condition of being on a team or something, had agreed to be a public representative of the school, and in that case they have violated that agreement. Otherwise, if they are in public schools, I think freedom of speech does apply. Calling their schools is, regardless of the disciplinary outcome, an excellent way to drive home the point to these students that if you publicly make statements, people can and will find out who you are and hold you accountable for them. You shouldn't make statements your aren't prepared to stand by. The online environment won't improve as long as people think that they cannot or will not be held accountable for what they do and say.