The moral issue is covered here...
Part1Part2Part3There was a guy where I used to live connected his house to his neighbour's electric meter He did time for that I think. It was either that or the flashing, I can't remember which. Or it might have been for getting his daughter pregnant.
Another guy I know runs his house off the street lights. He's not been caught yet. Not for that anyway.
Don't buy a hookey meter on eBay, that leaves a trail right to your door.