The one thing I never got about masks... They just cover around your eyes, it's the same as wearing glasses. Deadpool has a real mask.
Superman: Hmm... A mask makes my costume look weird. Wait I have it! I'll wear glasses and re-style my hair! Genius!
The best way you will hide your identity is to not be known by many people, like that episode of Justice League when Lex and Flash swap bodies.
Lex (In the Flash's body): Now I can find out who the Flash is. *takes off mask and looks in mirror* I have no idea who this is.