Makes me wonder about the unreleased, 'Player Inspect' element. If it allows a user to see where another has unlocked a reward from, you can easily route those users out. And you'll then proceed to see people dedicating their time to find these folk in public spaces.
Its always the same regulars in here too. This is like the worst night club ever...
Imagine that. Actually a few are missing, but give it time. I love how people know, but they don't know...LOL.