Idiots have called before, but never leave a message. Too stupid to realize that most people will not answer unknown calls. If they would leave a message saying who they are, someone might actually respond to them. If I know who is calling, I may pick up.
Company calling claims that there are a lot of break-ins in your neighborhood and are offering a free $850 security system for free for just "a few minutes of your time". I barely got no out of my mouth and click, they hang up. Scam.