I appreciate it when people let me know they have a gun on them or in the vehicle, while it is no guarantee, it's a strong indicator they are good to go.
I'm a Watch Commander with as many as many as twenty deputies under my charge at times. I don't like it when my folks take possession of citizen's guns for the duration of the stop or encounter without good reason, but I also can't tell the not to because that's 1) an individual officer's decision and discretion; and 2) the USSC says they can.
I will, and have, discussed their decisions to disarm citizens, and in do so, allowing them to understand perhaps how they made the citizen feel. What lasting impressions are left on citizen for being disarmed just because?
As a supervisor, it's a slippery slope but I try to encourage officers to maintain the status quo if possible and thank the citizen for letting them know they are armed because in our state you do not have to do so.