We'll also throw in a wrinkle of number 4 - problems that shouldn't be solved by extra-judicial violence. And vigilantism often has that baked into the system in these type of stories.
This is a particular concern. The superhero's right to extra-judicial violence is underwritten by their ability to coerce (via super powers).
Consider the flip-side of Spider Man's mantra
With great power comes great responsibility
The innocent "happy face" reading of this statement is, "Hey, you shouldn't use your great power any way you please. You have a responsibility not harm people with all of that unearned privilege!"
The statement, however, also functions as justification for the powerful to take it upon themselves to break from the herd, convention, and law to set things aright.
"Hey, you have all this power! You have a great responsibility to punch evil in the mouth!"
Read in this second way and Spider Man has a responsibility to engage in using extrajudicial violence, because that is his great responsibility, his unique burden,
his struggle.
There is, however, a reason why we give the state a monopoly on initiating force on others. This is the exchange we make for leaving the Hobbesean state in which anyone may do anything and the strongest man or largest mob succeeds by sheer might. We exit the war of all against all in exchange for leaving the right to initiate the use of force to the state.
The superhero casually excuses him/herself from the social contract on the basis of some apparent exigency which only they can address.
Once the problem is solved, however, the hero remains as the unelected champion of their city. And there is always another problem, another villain around the corner. Just as their is nothing more permanent than a temporary government program, there is nothing more permanent than the super hero franchise. Eventually, they unify with other champions who are above the law and hang out in a Hall of Justice or Stark Tower.
The message is that we need people who are better and stronger than us to use primitive coercive solutions (e.g., punching, kicking,
smashing, zapping, freezing, burning) to directly deal with societal threats without interference from the government or international community (we'll play nice until Thanos arrives, but after he's here, the Avengers will assemble and you can wipe your backside with those Sokovia Accords).
It's not that the world is complicated and that there are dilemmas of morality and principle and that we should work together to find mature solutions around which we can unify, but rather that we should
- Identify the "bad" people responsible for our ills.
- Let our "heroes" break the law to violently suppress them and be grateful that they're there to handle the next threat.
- Rinse and Repeat.
That this is the predominant fantasy of our society is not indicative of a healthy culture.