My suggestion would be to say that one has freedom of speech so long as said speech does not become hate speech or libel. In other words, so long as free speech does not harm others. Of course, this can become very subjective (as it does in real life) and the rulers and those in power will inevitably err on the side of restriction when it comes to their own reputations and position.
Also, I would agree that mind-controlling magic should be seen as a crime (in the Harry Potter books it is one of the three forbidden forms of magic - the other two being the spell that kills outright and the spell that inflicts torturous pain outright). However, I think exceptions should be spelled out in the law in the case of self-defense. In other words it would be okay to inflict pain, mind-control, or death in circumstances where an aggressor is threatening lives (as in the case of a goblin attack or bandits or an intruder in one's home). As soon as some creature tries to violate the right to life, liberty, and the pursuit of happiness of another sentient creature then all bets are off - you should be able to use whatever force or power is needed to restrain, stop, or annihilate them. The law should spell this out.