I like to play WoW, and I enjoy raiding. I have yet to find a job that allows me to raid and have a steady sleep schedule. As a result, I haven't actively raided since Classic. I've been in a few casual raiding guilds that have allowed me to raid on occasion, but finding a guild that raids regularly on a schedule that allows me to be in bed when I need to be seems excessively difficult. Maybe that will change with this new optional-raid-time-extension patch, but I don't think it will be enough.
That said, I don't think playing WoW has an all around negative impact on people in regards to their ability to perform jobs well. Raiding is a group experience that requires teamwork, focus, and responsibility to carry out successfully. Leading a raid effectively requires leadership skills, strangely enough, and everything about WoW requires research skills, basic technical knowledge, and communication. Discriminating against people who play it is stupid.
Well actually in most big business jobs I have had yes they do control both your off time and on time. Ever since the PDA was created managers text their employees more than ever before letting them know how horrible they are doing every day they work. From my experience I've noticed more companies want to control the off time of employees to get more work done and use their personal activities as reasons to fire them.
Man, I am so glad that I got out of retail (knock on wood, I would like to keep my job). If I was working, I wasn't working hard enough (despite lacking the staff to get things done). If I was selling, I wasn't selling hard enough (despite constant unannounced changes to the policies that I was attempting to sell to now very angry people, to the best of my ability). If I wasn't working, I got cell phone calls about how horribly everything was going at work. If I was supposed to be getting off, I was given assignments that would take far beyond the remaining time to complete at the last minute.
They even said they would promote me, doubling my salary, so they increased my responsibilities and duties and all, put me through the training, and said they weren't going to promote me after all and kept me on the same schedule with the same responsibilities and duties without the pay increase. Then they hired some new staff, cut back on hours until nobody had any but the store and assistant store managers, and started to complain that we weren't meeting goals or performing our duties, which hadn't changed to reflect our hours. So far as they were concerned it was us not selling as well as we should be that was the cause of all their ills, not falling market share, the rise of new competitors, a three year void in advertising, or prices that continued to rise for services that continued to have benefits stripped from them.
So I found another job. One that pays more, has better hours, a stable schedule, people I enjoy working with, and utter freedom from constant doom and gloom from people who I'm sure were being pressured severely from above in a similar capacity. That's not always an option. I feel quite fortunate.
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