My call came in after I too posted an ad for a lost dog on Craigslist.  I received our dog back at 11am and the call came at 2:30.  A white man with no accent said to me I found a Black and Grey dog that fits the disp. of your dog.  I said Really? we got our dog back at 11am.  I said is it a Yorkie?  He said No.  I am gonna come shoot your dog.  I said What?  He said I am gonna come shoot your dog with an AK-47.  I am F'n crazy.  I couldn't believe it.  He than said that he was gonna shot my dog then come murder me.  Do you hear that.  Referring to the gun shots going off in the background the whole phone call.  I said I was going to report his number to the police and hung up.  The call lasted about 1.5 minutes.  I am sure it was a person pulling a prank call, but if I hadn't found my dog.  Would he have asked for my address.  Pretty scary.  That is how people get raped and murdered.  Seriously, we have to do something about this.