There's not any real concern here, it's designed to handle that.
But a lot of folks feel better if they initiate a reboot from the help menu, then pull the plug at the beginning of the boot cycle before it's accessed the drive, so that works too.
"I disapprove of what you say, but I will defend to the death your right to say it"
"Stop slouching! It's two O'clock in the afternoon, PUT PANTS ON!"
"Statistically speaking, there are two Popes per square kilometer in Vatican City..."