I still don't understand the hatred for Mr. Bieber. I know nothing of his music and nearly nothing about him, other than he started on Youtube, rose to popularity and that thousands of young girls find him dreamy. Apparently he's considered cute. I hadn't even heard of him for the longest time.
It's hard to say that his music, or indeed anything in life, is bad. That's called an opinion. His fans love it, but everyone else hates it. But is it good? No. Is it bad? No.
The kid is what, 16? He's rich. He is set for life and probably won't have to do a lot of work. He got lucky and was noticed early on. Because of being "cute and dreamy" he is incredibly popular and people buy his stuff because of it. Like it or not, he's luckier than a lot of us here, he has it easy. Is he a bad person because he got successful without a great deal of effort. No. He isn't any better either.
And about the Kinect thing. I think Microsoft had a good idea using such a popular person to advertise. It really isn't any different from any other company using a celebrity to endorse their product. Companies realize how people think, "If they have it, it must be worth having!"
Of course, not being the target audience, naturally we gamers would not find it appealing and are indeed repelled by it.
In closing, it's strange seeing people "hate" Mr. Bieber because of his fame. That seems like jealousy. Microsoft advertising the Kinect with Mr. Bieber is no different that what other companies do, and shouldn't be frowned upon. Remember, they're a company, they're out to make money.
This. Makes. Money.