a friend of mine did something similar. He had a masked IP at work, that showed he was somewhere in the UK, i think. He cant login from there anymore... Just an individual experience
Thats a different case though. It could be seen as the account is hacked if he logs on at home with IP of his home country and at work is a IP of a different country. It is physically impossible to travel between the 2 countries within the timeframe between home and work logins so hence it could be seen as suspicious activity.
Just speaking from experience as a ex-mod for another game.