IIUC, when anyone who plugs a removable USB stick in a PC it is mounted in /media/<user>/<label> and, as long as the FS in the device does not support privileges attributes (e.g. FAT32), anyone is granted the rights to overwrite anything (but partitions ?) in the device. So I don't see why anyone would be bored with authentication for this task. Let me know if I forget something.
IIUC, when anyone who plugs a removable USB stick in a PC it is mounted in /media/ <user>/ <label> and, as long as the FS in the device does not support privileges attributes (e.g. FAT32), anyone is granted the rights to overwrite anything (but partitions ?) in the device. So I don't see why anyone would be bored with authentication for this task. Let me know if I forget something.