system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel Comics] How much does the average citizen actually know?

There's a lot of weird stuff in 616. Atlanteans. A blue area on the moon. Moloids. Inhumans. Deviants. A new alien invasion every other week in the 60s (or early 2000s if you go by the sliding timeline.)

How much does the average citizen know? What's secret? What's generally known? What's known only to top secret government officials? What's entirely unknown but to the few involved? I'm not just talking about the stuff mentioned above, I mean almost literally everything.

What kind of world do they think they live in?
gpt
Like time travel, this is one of those fictional subjects that you best not scrutinize too deeply or else you'll get frustrated.  Or, if you're like me, you'll be reminded by how lovably stupid comic book worlds are.

For example, at one point the public knew that Peter Parker was Spider-Man.  Then he made a deal with the devil or some shit like that and now nobody knows who's in the spider tights.  What was common knowledge to the average 616 citizen in 2006 was back to being a secret in 2007.

Also, the entire Marvel multiverse just got destroyed and rearranged.  So what the public knew before the universal collapse likely got changed as well.

Then there's stuff that the public *should* know if we went by real-world logic, yet they don't because it would screw things up for comic book writers.  For instance, many of the things invented by Marvel's geniuses - Hank Pym, Reed Richards, Tony Stark, etc. - get flown around major cities on a daily basis.  The Fantastic Four has a flying car.  Stark has an army of robots doing various tasks at his company.  Doom has his Doombots.  Pym created an AI that regularly tries to take over / destroy the world.  Etc.   

You'd think the public - at least those in NYC - would have access to flying vehicles, or the police would be carrying energy weapons supplied by the Avengers or something.  You'd think NYC would be a technological utopia like what we see in *Star Trek*.  Nope!  John Q. Public is still driving around in Honda Civics; those poor beat cops still try and use revolvers to stop Electro when he breaks into a bank; Hell's Kitchen is still a shit hole; and NYC overall looks like what readers can see in the real world.

TL;DR: What the average citizen in a comic book world knows changes regularly.  And what they do know doesn't make sense.