I donīt use this style because i think itīs not a winner style. You said that that style never fails, but thatīs not true. If a player goes all in in the first hand and wins, you have to remember that also the other player did the same thing and lost. I have never seen those plays in real money
tourneys, because i think that there all players knows that they have something to lose, and in freeroll you have nothing to lose and something to win.
You said something important: do those players know what to do farther in the tourney? do they know another strategie than going all in?. The answer is very obvious (in most of the cases), but if you donīt believe me try to see like 3 players on a tourney going all in in the first hand, and then follow them along the tourney. Tell me in wich place do they finish (maybe iīm wrong and they place in the money, but i donīt think so).