Friend of My Enemy is My Enemy

If the enemy of my enemy is my friend, is the friend of my enemy also my enemy?

A new study utilizing data from the MMORPG Pardus confirmed the age-old maxim:

A new study analysing interactions between players in a virtual universe game has for the first time provided large-scale evidence to prove an 80 year old psychological theory called Structural Balance Theory. The research, published in the Proceedings of the National Academy of Sciences, shows that individuals tend to avoid stress-causing relationships when they develop a society, resulting in more stable social networks. [...]
The study, carried out at Imperial College London, the Medical University of Vienna and the Santa Fe Institute, analyses relationships between 300,000 players in an online game called Pardus (http://www.pardus.at). In this open-ended game, players act as spacecraft exploring a virtual universe, where they can make friends and enemies, and communicate, trade and fight with one another.

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