It's not what I learned that I regret, but more the fact that I had ever thought up such filth.
I still say the way I destroyed Morcalia was nice, though.
And I did learn from a show on the science channel that it could indeed be possible for planets to survive interplanetary collision enough to form another celestial body. (It's a theory on how our moon was formed.)
But back to the original thread, you never really know how good or "bad" a piece is going to be, unless you can look at it with objective eyes; I have a theory that to really be a successful fiction author you almost need a separate personality-a personality that might take form by way of a pseudonym, for some published authors.
And whether that secondary personality is the real author, or your objective reader, the opposite will be your judge.