More than 1,500 workers for the video game maker Activision Blizzard walked out from their jobs this week. Thousands signed a letter rebuking their employer. And even as the chief executive apologized, current and former employees said they would not stop raising a ruckus.Shay Stein, who used to work at Activision, said it was “heartbreaking.” Lisa Welch, a former vice president, said she felt “profound disappointment.” Others took to Twitter or waved signs outside one of the company’s offices on Wednesday to share their anger.Activision, known for its hugely popular Call of Duty, World of Warcraft and StarCraft …
