Read the Directions
Look, no one knows for sure if 2 boxing was going on, besides the people operating the computers in that house. The GMs probably have the best knowledge outside of that, and if they believe two-boxing was occurring, that is the final word.
Several posts here indicated that others did not know there was a "no 2 accounts from the same IP rule". How is that possible? It is stated clearly in a lot of different posts, most notably the Library/FAQ. There is even an exception process that supports multiple players from the same IP.
Even with the exception process, if two accounts are doing something suspicious that makes the GMs believe one person is operating both accounts at the same time, expect a hammer.
This whole thing is not rocket science, just a bit of reading, common sense and the ability to follow fully disclosed rules.
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