Account locked suspicious activity?

I haven't logged into WoW on my laptop in a couple weeks, I normally use a desktop at home, and right now I'm at work on my laptop. I logged in fine last night at home. I also use a physical authenticator. I tried to log in a few minutes ago and it told me there was a change in my login habits and I needed to validate myself via email I would receive in a few minutes.

I received the email, it was legitimate as far as I can tell, and said my account was locked due to suspicious activity and that I needed to reset the password. I tried going to battle.net and logging in and it told me the service was unavailable. I copied/pasted the link from the email, it was on the battle.net domain and secure, so I reset the password through it. I can now log in to both battle.net and in game with no issues. My characters haven't been touched, nothing is missing, so I have ruled out being hacked.

I read about the call in authentication service yesterday but as far as I understood, this was optional. Is Blizzard now going to lock people out anytime they log on from a different location?