Makes one wonder what type of distractions in the plane kept the pilot preoccupied?
Personally I tell folks that keep quite until we reach cruise, and out of any congestion. When decent starts silence again until shut down. However I do ask if they see another plane to say so.
It took a couple of times for my son to understand the SWA 737 at 37K was not an issue.

However he was about 5 at the time and was excited to be of some help. Now he's 14, and wants to do the flying himself. Which he does pretty well. Rock solid on holding altitude and heading. Always goes "Here you take it" When we get down wind. Be nice to have a CFI at BNO.
Fly smart, Bub