PC, just to add on a bit, I know this is hear-say (albeit from a reliable source) about this incident but I've been ignored a few times by people I'd normally have a pleasant chat with in CRC so I can speak first-hand about the indifferent treatment non-strikers are being subjected to.
I also have to say that if I got into a briefing room and was completely ignored by another crew member, I'd be tempted to immediately speak to the flight crew and express my concerns.
How can you effectively execute the fire-fighting drill or medical action plan if one element of the 'team' won't communicate with the others?!