I agree that it's a serious problem, but it's a long way from being a new problem.
Yeah, spying sucks. Horribly destructive for the game as a whole. There may be logically RP'd reasons for some characters to spy. But it still sucks, from an OOC perspective. When you know that every message you send to your realm is going to be handed over to your enemies, or perspective enemies, you hesitate to involve more than a trusted few in your discussions. This drives conversations into small, closed councils. You don't involve other players in your decision making process. This makes the realms quieter, and the players bored/dissatisfied. I've seen it happen quite often.
