Oh man, this is all getting a bit anal isn't it?
[BTW: The in with a ground station is legit - 90% of communication going on isnt on the VHF - but it is often at the same volume level - 'tuning' out is a skill quickly, and neccessarily learnt. This is something that - when pilots used to be bothered, or permitted, to do a proper ATC famils - they all came away saying: I didnt realise how much coord goes on in the background. So we are not ignoring you - we are just..... uhm, well, kind of ignoring you I suppose - but in a nice way!]