Totally agree
True but I think it's more that we are so used to having our cell phone with us the thought of not having it with us gives panic, you know that feeling when you can't find your cell phone. I can also understand fear of theft. Panic of not having your cell phone with you IMO would be the primary reason for someone to do what the woman did. If I left my phone in a bag my husband's phone would still work.
MDE is on there, or can be downloaded and log in information used. Most visitors have smart phones or access to one in their party.
Were it me? I either would have us all leave the line or been like "welp I'll get it after" because that's how I was raised