That was my gut feeling, but I also looked in the manual. I would have thought if removing the card while the scanner was on, there would have been some type of warning or caution statement warning against removal.
It looks to me like the only times the SD card is being read or written to is when the scanner is powered on and off.
Mostly I can see me "fat fingering" and inadvertently bumping the card when I try to hit "0" or ".no".
Another scenario is to put the card in my computer to transfer recordings to my computer and still listen to the scanner while doing so - possibly swapping a reasonably identical card (at least with the profile and favorites lists).