Originally Posted by cherokeesam
"The only people (in the MCU) who know everyone's identity is Fury and SHIELD?"
Are you serious?
Tony went absolutely global-broadcast-live in telling the whole damn world that "I AM IRON MAN." EVERYBODY on the frickin' planet knows who Iron Man is. After the events of The Avengers, everybody on the frickin' planet knows who Captain America, The Hulk, Thor, Black Widow and Hawkeye are, too. They've become rockstars.
Yes everyone knows who IM and Cap are. People don't know that the Hulk is Bruce Banner, and if they ever break out Thor's doctor secret identity people won't know who he is. And if I remember correctly Black Widow got away with her secret identity in IM2 so until I see proof in CA2 I'm inclined to believe her secret identity is still there(though I could be wrong) but Shield like any spy organization doesn't divulge it's members identities.