You don’t understand. Their personal device can be trashed immediately without any drawbacks to the mission.

If I go on a 10 day hike to the most remote location on Earth, and bring my yoyo to have some fun with, I really don’t care if it breaks on my hike, and the hike is not affected except for my not having fun with my yoyo.

I don’t think the phone in my pocket is “associated with my job” when I’m working, just because it’s in the same location. Do you?