Yes, I have read the classics; I especially love Dracula.
I also think that you're a bit of an idiot. Would you like to know why?
Firstly, I'm pretty sure that J.K knows what 'skilful' and 'demented' mean, because I'm sure I've seen her use those words in interviews and in the books.
Secondly, your comment of her having a 'lack of imagination', is also inane (now do you know what that means?) She evidently does have an imagination, let me give you some examples, the Room of Requirements, Quidditch, moving staircases, moving pictures/talking portraits, the dozens of spells, the descriptions of places like shell cottage and the Ministry of Magic, etc. Does this sound like someone who has a lack of imagination to you? If it does, then you either haven't read the book properly or read it at all, OR, and get this one, it's a personal favourite of mine, you HAVE read it, but because you are so determined to hate it, you haven't given it a chance. I know people can be like that, because I have a friend who is, she doesn't like anything that everyone else likes and she never even gives it a chance.
Also, in regards to your comment of `simplicity', the books are in some ways, `simple', but look at the age group that the books are actually aimed at, 6 to about 12. I know people over those ages read them, but that is because they are good. Simple isn't always a bad thing, it's punchy and to the point.
Now you also said `stupidity'. Let me point something out. You are stupid. Filch's first name is not `Argos', it's `Argus'. So therefore, it is not a reference to the store. It's more likely a reference to one of the Argus's from Greek Mythology. There are lots, Argus the son of Zeus, Argus the builder of the ship Argo in the tale of the Argonauts, Argus the son of Chalciope and Phrixus, Argus, the son of Phineus (which is the name of one the old headmasters of Hogwarts) and Danae, there is also one more which I think Filch if probably the reference to. That is Argus Panoptes, a giant with a hundred eyes. Yes, Filch may not be a giant, but he does see everything thing the students do, with his own eyes and his cat's.
My point is that whatever reference J.K. uses, it's a clever one, usually associated with astrology or mythology, for example, Bellatrix (star), Narcissa (based on the greek myth of Narcissus), Sirius and Regulus (stars), etc.
You also seem to think that referencing and being influenced by another author or in fact anything at all (films, etc), is a bad thing. But I'll think you'll find that most classical authors are influenced by and make reference to others work and things in general. For example, Stoker makes reference and builds up ideas about Dracula's psychological state by referring to the work of different psychiatrists. Also, other children's authors do the same thing today, Lemony Snicket, the Baudelaire's name is a direct reference to the French poet Charles Baudelaire, and Mr Poe is a reference to Edgar Allen Poe. Philip Pullman's His Dark Materials is also directly influenced by John Milton's Paradise Lost.
My final point to make, is that you don't seem to appreciate others opinions very much. Your comment is rather insulting (which is why I have replied the way I have, usually I am very polite, but you deserve to be spoken to in this manner). Especially when you say `I pity you, and laugh at you'. I think that you should be more considerate when you post a comment like this, because you just make yourself look like a moron.