You are firmly blaming the victim, that's why you are being downvoted. The answer to all this cannot be "there are assholes on the internet so don't go on the internet"
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Also, I think in plenty of these cases the victims are not going to the places where their attackers are. E.g. the victims of attacks organised at 4chan are not generally people who post on 4chan.
Hey, you willingly went into an online community. You should have expected to be downvoted into oblivion, and also possibly doxxed and swatted.
Right?
I would say that blogging on the internet is more like going out for a drink at the pub. You aim to meet and interact with many people with the same interests, have discussions, and enjoy a drink.
However, there is the possibility that someone may abuse this, maybe through drinking to excess and becoming argumentative. This, while annoying, can be accepted. However, if that person gets violent and causes harm, I believe that is unacceptable.