The very nature of this event and the fact that you HAVE to win 100 times (place 1st) to get the King Bean/Queen Bean title; and just the idea this might actually go away for a long while before coming back means people are going to feel the need to cheat.
This is how they wanted to design this event, so there shouldn't be any surprise that people would want to try and game the system; considering how difficult this can actually be for 'most' people.
I don't condone people cheating, but in the case of this event I understand the impulse.