Ive had it happen as well. Once was actually by my buddy who was with his friend and decided to play a trick on me. Unfortunately my mom was in town for that exchange. It started off with hey man, Im calling you about my money. and basically went down the path of you owe so and so and he owes me so now you ow me type of thing. After a few min of trying to explain they had the wrong number calmly, they started in on Im gonna show up at your house and rattled off my full name and actual address. At this point I was pretty confused and tried again letting them know they had the wrong person. they kept going getting more and more threatening about coming over. This went on for a bit until I basically snapped with something along the lines of Ive told you 3 times now youve got the wrong person, if you show up at my house, you'll be leaving in a F'ing bag do you hear me asswhole. My mom was a bit in shock to say the least. At that point. I hear roaring laughter on the other end of the phone and Im like WTF. Thats when my buddy decides to speak up and give up the gig. What a dick...