WHBM
You are correct on both counts.
For frequent travellers, not such a big deal, as we tend to know who does and does not wish to see the BP and act accordingly.
The irritation for me (as FQTV) is the less frequent pax holding things up searching through coats and bags for the BP, although in many cases I can't really blame them because no one told them to keep the BP handy.
I note that Jetset lady commented, on another post, that she now reminds the gate staff to tell the pax to show the BP at the door - that is helpful.