Yo sup, so I just now started my psn account. Just signed up, put in my info and all that junk.
Well, as soon as I signed into the network, I recieved a game invite for black ops from a user called TJ103008 from 1/30/2012 at 3:49PM.
I JUST made this psn account not 20 minutes ago. How did I get a message from that long ago when I didn't even exist?
Is this a brand new PS3? Maybe one of your kids/room mates/siblings borrowed Black Ops from a friend and gave it a "test drive" on your PS3?
It isn't likely that your PSN account is used by someone on a different PS3, as the Players Met only records when you play the game on the console.