I see your point, however I must admit I've been failing at being entirely specific about what he's doing - yes, he'll be figuring out how to hack a 3-button + voice command communicator. Yes, he'll manage to figure that out and hack into people's posts. But the thing is that he won't have time to hack into every private post that comes up.
That said, he will only hack into posts after I ask the affected players about - in other words, what he'll be doing is pretty much exactly like what Kay has just said with Lelouch is doing: He'll be listening and watching everything public, but he'll only hack conversations he's particularly interested in - in which case I will ask for permission.