Pretty lame - the guy coming out isn't at fault here. And yes, he is the fly on the turd, per the above analogy, but in this economy this may be his only gig. Also don't think he will take out his anger on his employer - if anything, he will take it out on you. You can be armed and have a security system etc. - it still isn't good to go out and make enemies you didn't have otherwise.
Maybe it is time to rethink how you connect to the world? I don't get why anyone would still have a landline these days. There are hardly any spam calls on a cell and if you do have them, you can send them straight to ignore, you will not be disturbed by them at all. And finally, how about turning your phone off when you go to bed?
G