I had the same 2 times. But I don't see any reason to mask the ip adresses of the abusive users:
94.228.204.2
and
178.213.33.129
But I'm not locked out which the mail says, because I'm always logged in.
However it's no good news when it seems people are trying to bruteforce accounts. Maybe somebody can do a good thing and put up some ip bans if they are not dynamic ip's.