A couple of points on this,
Its a good move that the club have allowed this apparent theft of infrmation get into the press.
It sends out a message to whoever has either stolen data or attempted too, that the club are both aware that its happened and also that they are coming after you....
The theft of data is one offence in itself, however if a club were to act upon that stolen information they have compunded the crime ( maybe a bit strong but you know what I mean) by also gaininig from stolen information.
Thus if the premier league were to investigate then the punishment would be far greater if they have used the information for financial/business advantage.
Think Maclaren in formula 1, they got caught with ferrari data and it cost them £100+m in fines and there were other penalties and I think they also lost a sponsor or two as well
Poaching players is not what this is about at all, it is coroprate theft possibly by a competitor, and I doubt very much if our owners will let this one go away.
it might be done in private but it could get very dirty and public.
Whoever has done it will not be feeling very good about it this morning having read the papers....