robb said:
How to kick out a invoked spirit ?
JoS said turn off the spirit after invoking but how ?
And what to do if spirit refuses? Or something malvolent is invoked.
This is one reason why it is constantly said here to read www.joyofsatan.org before even contemplating such things. It takes, on average, many years of studying the JoS archives and doing meditation before you will get to an advanced stage. When this happens you will able to perform rituals and magick without causing mental/physical harm to yourself and/or others.
There was a recent topic on "Ghosts" taken down off the boards, I assume, not because JoS is against necromancy per se, but because they didn't want to encourage the newbies to go dabbling in things they didn't understand. People have had their lives ruined and gone insane by doing this.
A time for everything, and everything in it's time.