This is rather a matter of priorities, because someone actually needs to go and do it. Complexity wise, this is not a problem at all.

Toribash is a free-form game, heavily dependent on its community. True, gambling idea has been suggested a number of times, but responses are very different and from being positive.

Personally, I like the idea. Even though concept of gambling is ugly and Toribash as a game has nothing to do with gambling, I believe that gambling can motivate people to play the game itself more and become more active on forums in order to gain more Toricredits. Moreover, as was already mentioned, fees from gambling will greatly benefit in stabilizing game's economy.