This is what concerns me.
Of course... Why concern yourself with all the real and tangible problems that exist in the world when there is fiction for you to worry about.
I read an article written by a former witch
If I had penny for all the evangelical fundies who claim to be a "former witch/pagan/satanist/athiest/muslim/drug user/smurf etc." then I would be a very, very rich man.
she was of the opinion that things contained in the book are quite dangerous
Really now? If that were in fact the case then surely you should have no problem citing some incident in which soeone was harmed by using the "dangerous" magical knowledge?
and that many of the spells and the wording contained in the books are in fact based in reality.
So why has no one ever used this authentic magical knowledge to win the $1,000,000 offered by the JREF? I highly doubt you can offer anything other than second or third hand hearsay in support of your frankly idiotic assertions. If you expect anyone with even a tenuous grasp on reality to take you even somewhat seriously you are going to have an actual witch casting spells straight out of a harry potter book.
Her statement was something along the lines of - if JK Rowling was not a witch - she was sure steeped in the traditions and knowledge of the occult enough that she certainly got all the facts right.
And what gives her statement assertion anymore validity than my assertion that Beccasue of Rapture Ready engages in necrozoophilic orgies with dead circus bears?