If he is stealing cable ring VM and tell them, and as regards grassing your neighbour, Id have absolutely no qualms about it. I'm not going to go into all the negatives of cable thief's as its already been done on other threads, suffice to say the thieves have a detrimental effect on an already over-loaded network, so shop the thief.
__________________
If you are in danger of being overrun call in the Frogstamper
Rimmer: OK, step up to red alert.
Kryton: Are you sure sir? it does mean changing the bulb