American Airlines - Please let me shave during takeoff

Several months ago, I read the following article. I was particularly surprised to discover that I am legally permitted to use an electric razor during takeoff and landing while on an airplane, but not use a Kindle. This needed to be addressed. Hence, the following:

Several months later, I received the following reply:

I guess they should re-read circular 91.21-1B before making such cavalier statements about what is and isn't allowed during takeoff. I should demand a full refund for discriminating against my beard.