[info4u]

I would say it sounds like theft and criminal damage

Since people are getting the service for free.
However without a STB and a paired up smart card they wont be able to watch the TV.

If its your PHONE they have tapped into then its a criminal offence in respect to invasion of privacy, since they can heavesdrop on the call, fraud, since they can make calls on your expense and costs.

Virgin is more than likely the company that will take action on behalf of your self and company loss of earnings

1) Crediting you back with costs of calls you didnt make
2) Loss of TV credits

They wont credit you back for the service if you was able to use it as you have received what you pay for, its your neighbour who gets stuff they shouldnt

3) They may also have them checked for a TV licence which may explain why they have tapped into your line, as they will only get the basic 5 channels and sky1 (when it was available) and shopping channels
As they are using a cable connection I dont think they get detected by the TV licencing people, subscribing to the service its self means they pass the info on to the tV licensing people, therefore putting them in risk of a fine if they arent paying.

4) its mainly the company that is affected than your self

But thats my personal opinion on this