I don't have a problem with fans communicating with each other and certainly banter is welcome. But in reality it tends to get beyond that between fans and that ruins it for everyone else then.
But to say that it's impossible for Cas fans to ignore Wakey fans - he has a point; it's hard to ignore it when it's on the majority of threads on the Cas board and similarly on the Wakey board.
As for Gilmour, he'll be a decent acquisition and a great role model/leader for the likes of Holmes and Thompson.