Bot Exploit

I have gotten this message twice now and I think it might be due to the bot. Blizzard sends a message basically saying a change has been detected in your login pattern so your account is locked until I input a code they send to my phone. I am not sure if its actually a big deal but it may be something worth noting and adjusting to in order to prevent future bans. I havent even been boting very much recently which is the strange thing.

Anybody else gotten this message?