Psyker Landshark said
But...superheroes aren't a secret in Marvel. At all.
Actually, in the beginning, the Fantastic Four was supposed to be secret, so were the X-men... And the Hulk... and most of the other Super Heroes. They started off with the Government trying to deny their existance.
Again, do you think it's smart for a Government to come out to their public and say. "So yeah... We just found out that any and all electronic devices contain monsters that can come out at any time and any place, some are small with big sharp claws, and some are the size of a skyscraper and have more teeth than the entire Osmand family... Good luck!" There would be mass hysteria, rioting in the streets as people accept the fact that they are boned and it's only a matter of time, instead, they create a safe little bubble of ignorance that the public can live in, blissfully unaware that, in the grand scheme of things, they are just Happy Meals on legs.