I believe you can go to an electronics store and purchase equipment to identify which appliances (telephone, microwave, cable/dish box, tv, computer, etc.,) are giving off tracking signals - that should tell you who and what has been keeping their eyes on you. Check your car and truck too.
You may not be able to identify the signal, as to tracking location but you will know what possessions you own that have tracking devices.
Oh, if I have nothing to hide why should they not be allowed to search - because I have nothing to hide, now 'Good Day Officer'. Or, if I have nothing to hide then you (the cop) certainly should not have anythiing to hide - so let's either swap driver's licenses and I will rummage through your gun closet and your wife's underwear drawer, or you can go back to your coffee and donuts.
By the way - does anyone know why police, whether off-duty or not, refuse to be questioned by the citizenry?? Anyone ever encounter one at the range who refuses to follow range commands, show his id when challenged or produce a valid license for his handgun? Mikey.