No, the cannons have not been fired at every home game. It started about the middle of the season. Also, blaming the firing of a cannon for a reason you lost, is childish. Yeah, the first time we heard the cannon, it scared us too because we weren't expecting it. But it didn't scare us enough that we wouldn't be able to play a basketball game. But, as for your question, no...the cannon was fired for the first time somewhere around the middle of the season.