Who's the most powerful entity in DC universe?
The New God Darkseid? No
The supersane Joker? No
The always ready Batman? No
The time and space vandaliser Flash? No
Here's their insignia
Still no clue? Their tyranny transcends universes, and they're the dread of every independent men and women, at least in multiverse America
Here's the blatant clue
See, the answer is right there. Even the one who suppose to even aware that he lives in a comic book fear them. You shall never run away from their tyranny, and you might prefer to spend your time in a straightjacket than to suffer the consequences of disobedience.