"Due to suspicious activity:"

Q u o t e:
Yes, use of proxy and tunneling services can and will cause this kind of account lock.

You can call Billing; there may be things that they can do to assist. Also, make sure to always connect using the same tunnel, and never turn off the service - even when connecting to the websites.

Ultimately, the only surefire way to stop this is to cease using the service.

That is excellent advice, Pahanda. Unfortunately, Koilipolazia, in an effort to help prevent the compromise of player accounts there are occasionally those who may find these methods too restrictive in how they are currently connecting to the game. As stated previously such services are not prohibited though neither are they supported, they very well may continue to lead to such temporary locks.