I think that this could be a cool way to battle gambling addiction, if someone start writing the entire money they use on gambling down somewhere they can wake the hell up and decide to call it a quit, it's definitely going to look stupid for playing all along, the only difference for me is I use very small amount.
Yes writing the record of your deposit and withdrawal is a good way to take a check on yourself to keep playing or not but I don't think it is for the addicts. An addict won't have that mindset to go that way because he is still engrossed to keep trying to win but anything that leads him to start going for records on his activities on gambling then that means he is near to quitting the addiction because he probably would see his losses and that may discourage him from playing persistently or quitting eventually.