I would really like to think that this technology we surround ourselves today would make things much easier to stay in touch, no? When I was a kid playing in bands etc. in the 80's, I had to actually put myself in MORE danger sometimes by walking down a street to a public phone to call my parent or arrange a lift after gigs. I am glad my son doesn't have to do that.

"Giving him a call" is all fine, except if they are mid set or are tearing down while another band plays - stages can be loud places, and not the best things for talking on a phone, or even texting when they are busy moving gear. A quick check to see "Oh, he is still at the venue" or "He appears to be at the band's storage lockup right now" is enough for me to know that it is pretty much ops normal.