I'm pretty sure that's the case. I got suggestions for 2 people I played WoW with and the only ways we communicated were in-game chat, voice chat, and we had a

I'm pretty sure that's the case. I got suggestions for 2 people I played WoW with and the only ways we communicated were in-game chat, voice chat, and we had a single e-mail chain where we (the officers) talked about....something, I forget what. I'm guessing one of them imported their mail contacts because I doubt LinkedIn has visibility into Blizzard's social network or private voice chat servers. I think the creepy part about LinkedIn is you can actually see who views who. If Facebook did that it would be very embarrassing for a lot of people.