Disagree. Its natural human behaviour to react if attacked. Its not natural human behaviour to attack someone for no reason other than to cause upset.
Neither of the two conditions you describe are natural. Both have the same origin caused by being put down as a child.
Think about what it means to be attacked. It is natural to react to a physical attack but how can you be attacked verbally? Imagine a person whose language you don't know adopts the body language of a kind person and hurls every imaginable insult your way, you won't feel attacked at all.
That is because you have no pre-existing associations with the words he uses and emotional pain. You see, the only way you can be insulted is to not only know the meaning of words, but to know them on a feeling level, a level where those words trigger past feelings of pain. It is having been hurt by words in the past that make words that you emotionally recognize as associated with past pain feel like an attack. The reality, however, is that you are in the presence of sound waves. It is only the meaning that you give them that causes you to react.
The person who has relived his past experiences, felt his or her ancient pain, understands that he or she was put down as a child and internalized those feelings and then as an adult now sees via memory that what he or she was sold were all lies, that can be free from such feelings of attack.
So while it is common, very very common to react to being trolled as it were, you can really only be trolled if you already believe what is coming your way.
This is why people can be trolled in two ways. They can be trolled by folk who are filled with their own self hate, and those who know the truth of that and tell you it. There is no difference in the reaction of self haters to being played by their self hate by a troll who wants to hurt, and being told as a heads up that this is their actual condition. Sadly, both look like the same troll even though they are completely different.
I have demonstrated this fact a million times in this forum but the blindness to our inner reality is immense. There is nothing that surfaces our hate faster than being told you hate yourself. We are prisoners of a catch 22. I will not look at my prison of self hate because I will hate myself if I do. And if you tell me that's my condition, I'll hate you.
So you see, truth is a troll and so is a truth teller.