If they have access to the network at all, I think they would be able to see other posts, rather than only their own.

[He is quiet for a moment, thinking it over.]

I suppose it could be possible. I have never seen them take that shape, and it would have to be a very limited Null, and they would have needed to find a way to replace the original phone - since I make one for each of you. But I will admit I do not know everything they can do.