What annoys and concerns me is the trend to shout down those who are perceived as having views which are different than "my" own.
This is increasingly common behaviour among feminists, climate-change warriors, alphabet-soupers, Clinton supporters, and Islam-is-a-peaceful-religionists. They can't defeat logic and facts, so they jeer, disrupt, protest, shout, and generally make themselves as irritating as possible, and the popular media eats it up. They demand that their feelings are more important than truth, and that everyone make allowances for them, while they make allowances for no-one. They scream "tolerance" while being the most intolerant of all.
What is more scary is that Western nations are making laws which support and protect this behaviour. It would not surprise me to wake up in a world with thought police. We're not that far from it. Free speech? Yes, certainly, but only if you agree with their agenda. Otherwise, you are told to shut the ( ) up!