1. It is not true that there are many people doing this. In fact, I have never, ever witnessed such a thing, even though I live in Eretz Yisrael, and even though I used to live in a very Chareidi neighborhood, nor have any one of my many acquaintances ever once mentioned seeing such a thing. In fact, it is only in the Coffee Room that I ever even heard of such a thing.
The fact that something is reported on the news does not mean that it is a frequent occurrence. It just means that it makes good news. (It actually doesn’t necessarily mean that it ever happened at all).
2. If there are a few people doing this, they are not Chareidi. Even if they dress Chareidi ( I have no idea if that is the case or not, since I never saw or heard of it, and don’t even know if it ever happens), that doesn’t mean that they are Chareidi.
You can’t judge people by the way they dress. Just like you don’t think the soldiers should be judged by the way they dress, so too others should not be judged by the way they dress.
3. If such people exist, they would not listen if any Chareidim told them not to do so. People who do things like this are not people who listen to Chareidim (or to anyone).
4. No, most (if not all) Chareidim are definitely not okay with name-calling!