There is no reason why you need to transmit any transactions. In fact your best chance of executing a double spend is similar, these kind of attacks are called

There is no reason why you need to transmit any transactions. In fact your best chance of executing a double spend is similar, these kind of attacks are called finney attacks. http://bitcoin.stackexchange.com/questions/4942/what-is-a-finney-attack http://bitcoin.stackexchange.com/questions/4942/what-is-a-fi...