That wasn't my point. Nobody knows how many hackers there are in total, and Zanzarino is the only one who can do anything about it, so any concerns about hackers need to be reported directly to him.
Pilchard, did that player have a lot of upgraded cards and such? The top 50 does reset on a weekly basis, so it is quite possible for a new player to have a #4 rank if the weekly reset just happened.