I’ve had quite enough of service providers of one kind or another making me part of their new social network. (I’m looking at you, Google Buzz.)
So here’s an article about how to control iTunes’ new Ping social network, which comes with iTunes 10.
Apple did a couple things right: They made it very clear in the “Terms and Conditions” click-through for the new version of the software that you’re getting Ping. It also appears to default to “off.” That’s what I found when I followed the directions in the article linked above, anyway.
If you want to be in yet another social network, you can enable Ping using those directions. You also might want to get your head checked. Something might be wrong in your real life.