Meh. When someone proudly announces to the world they are deliberately doing unsafe things as if they are untouchable, then it is only fair to be mocked when they are finally touched.

In some cases "victim blaming" is just fine.

Like if someone purposefully runs at a brick wall, it's just fine to go <nelson>HA-HA</nelson> at them. Did they expect a different result than pain?

You should not have mercy on someone who repeatedly ignores all warnings without thinking and then hurts themselves in the way the warnings promised. At that point you are on your very own.