Yeah, but the thing is, you can't actually address it.
I mean, you can't be a fan of Superman, and complain that people don't know that Clark Kent is Superman. Or that people should be mind whammied.
It's the only Suspension of Disbelief that cannot be broken. It's like the Fourth Wall, you do not break it on a show like Smallville. Alfred Hitchcock would agree with me. And he was one of the first people in TV/Movies to break it.
As Tempus said on L&C, "How dumb was she?"

You're asking Smallville to ask it's fans, how dumb are they?
It's something this show cannot do. Addressing it, shows that Smallville thinks it's fans are so stupid, that they need things spelled out for them.
That's a death sentence.
Not to mention, anyone who's read the Superman comics knows it's not a major thing. One way the comics finally explained it was his Super-Hypnotism, in the Bronze Age.
They never explained it since. They have no reason to.