I think staff should definitely audit accounts of the top 3 players every few weeks (if they don't already), seems like at 1 person who placed is tattling on themselves for account sharing
I don't feel like raining on anyone's parade so no names will be said, but I can definitely see how PKers and BKers would be tempted to do this
I think some people aren't even aware that account sharing is illegal
Also, challenging someone to make top 50 in all 3 categories