Totally - Blizzard is 100% responsible for teaching you how to properly configure your firewall, thus they've got no security because you decided to turn it off completely in order to play games rather than take it as an opportunity to learn how to use your software properly. Players are _never_ responsible for the security of their systems. After all, the name of their company *is* "Blizzard Entertainment and Security Services of North America, Inc."
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