we both enter in the same information about our game plays. It would be nice for one of us to put in the info, and then send a "connection request" (or something) to share the info. then you would have the option of accepting and add it as a game play for yourself.
I think sending a request isn't necessary since it would fill up your inbox pretty quick if you play a lot.
I doubt there are many geekbuddies trying to sabotage/spam their friends Played stats.
If a geekbuddy said they played a game with you it should automatically show up and then afterwards you always have the option to delete/edit the record from your own Plays. If a geekbuddy is actually spamming you with Plays I think it would it would go against the website rules and they should get booted or blocked.