I have recently come into contact with a religious sect that preaches that, basically, people become "guardian Angels" after their body dies. And then they have to go around and perform routine maintenance on families', and others' pathetic lives, helping them with troubles. I'm not sure that I want to hang around dead relatives and descendants all day. Since I'm not too sharp on the Bible, can anybody fill me in with verses as to why there are no "Guardian Angels"? So that I may use said verses in my argument?
I know there are some Bible geniuses here. Please help a religious illiterate.