PSN Scam friends?

I’m annoyed, I keep getting friend request and messages from random people I have no idea who they are they seem like scammers. Here is a screen shot.

PSN 2-2-2

Sony have announced that the activation count on downloadable titles for both PS3 and PSP will be reduced from the current five to two. The update is scheduled for November 18 following a period of maintenance. The change will be applied to purchases after the update, so users won’t have to worry about PSN purchases