After every pvp match of an important event (Trials, Weekly Tournaments, Wars, etc...), we post our decks here also to show if they are legal or not.
But this way is easily to bypass: if I want to cheat I just can use an illegal deck and post in the forum a legal one.
Pvp event rule that says it's forbidden to edit a post doesn't resolve this question.
So, I wanna suggest this:
Someone (Zanz) should create a sort of summary page at the end of every pvp match, to show statistics, decks, players names, etc...
Imo this could be a nice solution about in game player honesty.
Waiting for community comments...
EDIT: removed some "..." after Higurashi request.