Same here, not many of my RL friends play.... unless they, like me, are 'hiding' it from me/them.

My friends don't play WoW either. Only "free" to play games. /facepalm

And what about people who don't have any real life friends because they spend all their time playing Warcraft?

I have real life friends who play WoW. And real life friends who play other video games but don't play WoW. And other real life friends who don't play any video games.

My girlfriend plays, does that count?

This shouldn't be coming as a surprise to anyone. As many commenters said during the debate, this was the direction (if not the primary purpose) Real ID was going for in the first place. They actually signed the partnership agreement with Facebook back in May. Since this is the primary function of most if not all of Facebook's apps, it was only logical to assume this was Blizzard's plan. While we're now told of the options for friends and friends of friends is on Real ID's end (after Real ID is already being used), what will they be on Facebook's?

If you hide the fact that you play WoW from your friends, you may need new friends.
...
Okay, that was kind of a jerk way to put it. But if you don't want friends to know you play WoW, are you afraid they'll shun you? Because then they're crappy friends.

None of my real-life friends currently play WoW. The only ones who did have quit until at least the release of Cataclysm.

Thinking about it, most of my RL friends don't play games at all. I met most of them through other interests I have outside gaming and I'm unlikely to convert them into a gamer in the same way they're not likely to get me to enjoy activities they enjoy but I do not. I game with those that do game, and with the rest, I do other things.

@ clydtsdk (who i'm guessing plays a dk): i'm in the same sort of boat as sloth there. i met my friends before i started playing wow. they're not into it. i am. they're into smoking pot. i'm not. but we're still friends.

they wouldn't shun me if they knew, i could just do without the constant ribbing.

or maybe i should just tell my friends all my secrets, like you apparently do. :P

You may be surprised, using the facebook friend finder I found out I had 8 friends that played WoW that I wasn't aware of before. We'd just never talked about games.