I was thinking exactly the same thing re the ban, its no deterrent to ban someone from something they don't do already. I couldn't give a flying fig if I was banned from F1 for example so I might aswell just racially abuse Hamilton if that's all I'm going to get.
Sad to say that, until that time a few hundred years in the future when everyone will basically be "mixed race", racism will never be stamped out. You can never stop an idea, only make it so socially unacceptable that its driven underground which will actually make it more sinister. Eradicate it from social media for example, and it will find some other way to surface, probably more violently.
I'm obviously not saying we shouldn't try to stop it or ban it from social media, just that I fear for how it may manifest itself if we do.