It's an honour system thing guys. Sure you can all cheat, but then what's the point of even competing in it? At the end you're expected to post a screen shot of your win/loss ratio's. You can do it in trainer if you so wish, and tally the losses over all, so long as you use the same deck each time. At the end of the two weeks, you post your deck, screen shot of win/loss ratio, and the average turns it takes you to lose.
Doing this as a tournament is an interesting idea as well though, and perhaps you should consider that in the future.
In the end, the judging is based off of how bad your DECK is. The deck that losest most quickly is ultimately the winner.