If somebody I didn't know that also didn't already have rapport with the community bet anything other than chump change, I would pretty much assume they won't pay up.
That being said, it'd be pretty cool if there were a game system in place that allowed duelers to bet on the outcome before the duel started. Would probably need to restrict it to only the duelers though, otherwise non-dueling participants could just offer gold for somebody to throw the duel. Would be pretty funny to see both duelers trying to throw a duel though...
I don't know why people agree to the bet if they aren't going to pay. I've had some people like that as well never as high as 100k
i think the OP meant that he wanted an in game mechanic to placing bets. that way, the other person has to pay up.
so like, add to the action wheel menu a Duel Player With Bet or something like that, and both players have to have the cash on them and the game takes the money out of your hands and then whoever wins the duel has the money mailed to them or something like that.
the honor system is just that. would need something in game