"Clark Kent. If you can't see past his glasses, then quite frankly, you need glasses."
—The Nostalgia Critic, "Top 11 Dumbest Superman Movie Moments"
Peter Parker: I used to be so much better at this whole secrets thing...
Betty Brant: Don't kid yourself, Peter. You always sucked at it. We were all just too blind to put it together.
Fisto: Hey, Mekaneck, what's Prince Adam doing fighting Modulok, all shirtless and glorious?
Mekaneck: That can't be Prince Adam, Fisto. Prince Adam's giant green cat doesn't wear a mask.
—Seanbaby, on He-Man.
Let me guess, you've got a loosely formed idea that shouldn't work on paper but ultimately proves to be reasonably successful?
—Burton Guster, Psych
Samantha Wilkins: How did you—?
Professor Hiles: Are you kidding me? You're not even wearing a mask.
"They're them, I have it all figured out, see. You know how Clark Kent puts his glasses on and suddenly nobody can tell he's Superman? The same thing. You can stare at the video all day, I know because I have, but your brain just refuses to make the connection unless you force it to. The magic even extends to MPEG. How else could someone in that outlandish costume go incognito?"
"You are all fools! All he does is put on and remove his glasses! That's his whole disguise! And yet somehow nobody figures out that they are the same guy? Come on!"
One of the comments (by Carteeg_Struve) in Merry Zodmas: Christmas Specials. But he/she was talking about Zod and the Nostalgia Critic.
Lori: Let's review: you always disappear when the wolf shows up, and you reappear when the wolf is gone, but you're never together at the same time. You do the math.
Tommy: That doesn't mean a thing! Take Clark Kent and Superman. They're never together in the same place at the same time.
The Flash: I still don't get why you don't do more to protect your identity. This new Lantern? Kyle? His mask covers most of his face. Smart kid.
The Flash: Clark slouches, wears clothes two sizes too big and raises his voice an octave.
"Hel-lo? Danny Fenton? Danny Phantom? Ever notice the similarities?"
"That's right ... Peter Parker took photos. Of himself. And sold them to this man who never, ever wondered why this one guy could get nearly all the photos of Spider-Man ... all the time."
Carol: "Hal? HAL?"
Hal: "How did you know it was me?"
Carol: "I've known you my whole life! I've seen you naked! You think I wouldn't recognize you because I can't see your cheekbones?!?"
Fiore’s real superpower may be being the only one in the entire anime who has the ability to see that Sailor Moon and Usagi Tsukino look exactly the same. He only met her once, too, and he doesn’t even know her name. Putting everyone else to shame.
Beast Boy: "But what about my secret identity!?"
Raven: "What secret identity? You're green."
Ernst Stavro Blofeld: It takes more than a few props to turn 007 into a Herald. [breaks Bond's glasses]
James Bond: It'll take more than cutting off your earlobes, Blofeld, to turn you into a Count.