I think you know deep down what you did was wrong ,I wouldn't think that they could add the other charge's at a later date .BUT it could be a beginninjg of a lot of hasstle from the warden in the future. I'd just pay the fine and consider myself lucky that I never recieved the fine's your friend had recieved .Next time stand by your gun's and say what you feel and you won't have to go through this again .

nubo