The card reader is viewed as a "Removable Media Drive]". Meaning what? You can insert and removed media from it. Its just like having a zip drive or Jazz drive or some other "Removable Media Drive" connected. There is no need to stop the device before taking out your memory card. Just be sure you don't have it open or are writing to it when you pull the card. You should be fine. I make it a point to wait about 30 seconds after closing the window before pulling my memory stick to be sure its done writing. No corruptions and no issues to date.
The only reason you should need to stop the device is for removing the reader.
The only reason you should need to stop the device is for removing the reader.
