In some odd kind of way, we do all "know" each other. We are one large, extended family. We sacrifice holidays and weekends to make sure the show goes on. We do what we do because we love it. The cast member in question had for his main Facebook photo a picture of him on the Monorail, under occupation he had "Pilot on the Highway in the Sky". He was someone who did what he did because he loved his job!
So yes, we do all grieve when something like this happens. The show does go on, but things "backstage" are very often sad. I cant even imagine what it must be like to be a Monorail Cast Member the past few days.....