Microsoft Corporation (NASDAQ:MSFT) shares are trading lower today. The acquired video game giant Activision Blizzard’s World of Warcraft employees have reportedly voted to unionize, adding around 500 workers to organized labor’s presence at Microsoft. An arbitrator confirmed that the majority of World of Warcraft employees support the Communications Workers of America union, Bloomberg reports. This new bargaining unit, comprising artists, designers, engineers, producers, and QA testers, may encourage further organizing within the company. Their successful organizing effort, supported by Microsoft’s union-friendly stance, boosts the number of unionized U.S. gaming employees at Microsoft to about 1,750. Read: Here’s Why Activision Blizzard Workers Are Planning A July ...