I answered the call. Try and get their information such as name, who they work for and such, get more information. One guy that calls is known as Calvin Richardson. When backed into a corner he claims he's from the DoD.
Get information from them if you pick up. Act like you're the home owner. The information I got is his name is Calvin Richardson. Trying to do home improvements in Lancaster, somehow he has addresses, but they aren't accurate. When I flipped on him, he dared me to call the police and even said he was from the Department of Defense. I've received this call before. The guys not that bright. Get whatever info you can and tell the authorities.