Saying screw you isn't exactly very encouraging. I, for one, didn't really get into the Chronicles of Narnia, but do I say, "Screw you, Lewis"? Nope. So don't flame here, it's not nice.I hate Narnia..But..I hate Harry potter more..so..Screw you Rowling, I vote for CS.
And quite frankly, a lot of people have a lot of respect for both authors, so don't do it.