That's outrageous. So my psycho ex, who would love the opportunity to fuck with me, could mail me a pound of brick and then anonymously tip off the cops to watch for it, and then they have the right to enter my home and shoot my dog?

WTF! The judge who signed the warrant based on that type of evidence needs to be knocked off the bench. Sounds like a politically-motivated setup gone terribly wrong to me, and a savvy judge would have questioned that too... I'd start investigating his political rivals.