I remember being on call (a few years ago now )for A N other co, and getting a call from the operator someone trying to reverse call, I refused (as I was not the bill payer) I then get a call direct from a chap pissed that I refused his reverse charge call, I explained that I am not the bill payer and that I was not authorised to make charged calls. He then went on to tell me that my alarm was ringing, so i went to my keypad and then outside and said, "no its not" he said yes it is listen I could hear a faint ewd in the background. I said thats not my alarm? he said its got your number on it. I went on to explain that it has the alarm companies number on it not mine, and if its ringing then he should call the police as its a burglar alarm and there maybe a burglar. He asked me to come and stop it, I said firstly I cant do that because I would be trespassing, secondly because I dont work for free and there would be a charge, and if you dont like paying for phone calls you certainly wont like paying my charge, with that he put the phone down