Who ever put vbulletin up on Tera-online is not very bright and didn't close registration.

OFFICIAL Site
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http://tera-online.com/main.php
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OFFICIAL Register
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http://tera-online.com/utility/join.php
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CLICK HERE
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http://tera-online.com/forums/register.php
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EDIT Profile
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http://tera-online.com/forums/usercp.php
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And there you have it