I wonder how many airtags that are active and reporting are present in a large mailsorting facility at any one time.
Since they talk over iphone's bluetooth I think I would expect if you walk into such a location with an iphone your phone might freeze from all the traffic!
@Amikke The density in a room full of people vs a warehouse is probably hugely different. Thought your right the range might work in its favor somewhat.
@freemo I assume they just announce themselves so the traffic would be comparable to being in a room with some people whose phones have bluetooth turned on and discoverable, especially with bluetooth's puny range.