The seals are the equivelent of a phone number, they aren't individually given to 1 person. Nearly all the grimoires have been translated throughout time, the seals are copied and get lost in translation, thats how many are different, but I have used seals that thousands of others have and with good effect, so are you saying the seals in the Goetia don't work, if so how do you claim to be experienced in it?
I know people who have used the system, and had good results from the seals given in the book, no conversation with their HGA either.
Its not a load of crap people dying or becoming ill from dealing with demons without binding them, they can have a negative effect on you if you do not follow the instructions given in any book. I took this from your profile, talking about demons "They will overpower you ifypu are not mentally strong", so what is true your post or your profile?