I decided to do this the smart way.
I made a call to the cops this morning to register the problem, and they said that if I have enough evidence they can have him charged. I have a fair bit already, including the original threat, the half-threat about the nailbomb and the rest of his insane ramblings. The posting of my address is the clincher and is enough to have him picked up by the cops, but I haven't got that proof because the guys have been thoughfully deleting it, but next time he posts it could someone give me a link before they delete it? Once I have enough evidence - and assuming the shit keeps coming - I will make an official report.
All his photos have been catalogued as evidence that he is a fruitcake, and his online confession about abusing hallucagenic drugs was very interesting to the cop I spoke to. I also spoke to my mate's solicitor about a restraining order just now. He says it isn't his speciality but he ran me through the process and it is way easy. As far as the law stands, a existing restraining order can have names added to it at any point, you just have to speak to the original magistrate and show the evidence, so if anyone else feels that they would like a guarantee that he never come near you again or contact you in any way, feel free to drop me a line to discuss it.
I never really dealt with cops before, but now that I have done it I don't feel anywhere near as dirty as I thought I would. It is different when you know the cop personally, it feels less like being a dog.
I also found out my exact rights as to self defence. As long as it is within the bounds of my property, I am legally allowed to use "Whatever force I feel is necessary" to protect myself and my family. Considering the weight of evidence I have here, I feel that the force I deem necessary may be quite a bit. Unfortunately, my dogs have no rights whatseoever.
Other than the threats, this situation has worked out really well for me, I have met a lot of new mates and reconnected with some older ones, all of whom have offered nothing but support and advice, and in some cases muscle. One even offered to spend a few nights here just in case of trouble. That's the Perth metal scene in a diorama, we hang together and have each other's backs, and troublemakers are outcasts. Fucking glad to be here, and I think under the circumstances I may have to reconsider my promise to never host another party again.