Well, logically I would have to say you can go ahead and destroy it for yourself. From my understanding, if you can show it that you have absolute power over it, it'll just kinda...leave you alone.
I could be totally wrong though, I'm not very well versed in the ways of the Lemegeton and all it's practices.
But! I can give my two cents in regards to maneuvers outside of the Lemegeton ways, such as invoking your own divine love as protection. Holy symbols, not necassarily ones of a Christian/Catholic nature, even a blessed pentacle, or some homemade holy water (the witch's way). A witch's bottle, sage and cedar, dragon trees, ginger incense, brimstone (not burned, but spread around your house and pinches of it on the corners of the house), etc...
So that's my speil. I wish you much luck in figuring this out.
Namaste
--------------------
|