You haven't seen it in your games because I have discovered it very recently.
There is another "trap" for you to discover in that position, it is when black play Qh4 instead of Nf6
There is no trap with Qh4
just a better position for white
Funnily enough, everybody in this thread is wrong. The OP is right, this is a trap but he didn't "discover" this trap either. He found the trap by himself but this isn't the first time it's been played. I've had a similar position occur at least a dozen times in OTB blitz.
Cellomaster8 is right, this isn't the main line. It's obviously not the main line because it's an opening trap. So, I don't know what your point is. I guess you're just trying to argue for the sake of arguing. Example:
There is no trap with Qh4
Same type of "trap" as Nf6 - black blunder a piece
You haven't seen it in your games because I have discovered it very recently.