same thing about the security sign in the yard.
turns out they called my google voice number, which is routed through my cell.
must've got their hands on it somehow.
Left a VM on my cell phone - 3 repeats of message. "Local police recommend you protect your home. We will place a small sign in your yard - no cost to you whatsoever".
I placed an add on craigslist the night before and i was called by the number next day and.. told me same thing only when I hung up my phone froze.... it was weird.