So, the big question is, as humans we are not perfects, how are we going to manage to minimize the risk of the bad things?

Copyrights, I'm not a big fan of this, but big studios, from Sony to Disney, will be concerned of this. And I guess they will try to shut it down. But, how do you shut down something like decentralized blockchains?

I mean, I think your project is awesome. I just can't understand how is this legal yet.... Or do you leave a trail when you upload things to the Etherium Blockchain besides the wallets IDs?

As you said, double edged sword. It will be incredible good for countries where freedom of speech is not guaranteed, but it will suck for people with bad intentions.