Yes, and technically if you dont just comply straight away it might occur to them to sue you for loss of custom, including a projection forward over the next 40 years at the rate of 20,000 profit per customer for the 10,000 customers they claim you have stolen thus resulting in them sueing you for 200,000,000 pounds.

Ok, thats a bit over the top, but you see my point?

Get out now while the going is good.

DONT hand it over though if they have given you the choice, just lay it up, it take it off the web.

If you hand it over then any search engine entries that point at it will do them a favour.