I don't know any of the details about this sad case, but I'm broadly in agreement with the people who say that confrontation is best avoided. The problem is that we are human, and when some other road user does something that I regard as extremely stupid/arrogant and puts me in physical danger, I get a bit angry. I don't want to physically harm them, but I want to point out reasonably forcefully that they were stupid, and some angry and possibly rude words might come forth. It's not ideal but it might be a bit of aversion therapy for their benefit. Of course, it might make them even more determined nutters, but I find it hard to just bite my lip and take it after a horrendous rush of fear and adrenaline.