While I should encourage posting in general, I've never been fond of the idea of people sharing decks before tourneys. Reason being tourneys are supposed to be a test of your individual prowess as a player, unlike many PvP Events that are team efforts. If people only used deck ideas as deck ideas for inspiration and whatnot, I wouldn't mind, but unfortunately many will always copy straight off. Nonetheless, I won't do anything more than disapprove as long as you don't post decks in the tourney threads (which has amusingly enough been done before).
You could, however, just not mention the decks are for a specific tourney until they're over.