I note some of you are treating this extremely serious matter with levity. Have you no stomach?
If the price of chocolate doubled or tripled, it really wouldn't have any effect on whether or not I eat it. If it went up 1000%, I would certainly think twice before buying it. However, my guess is that an increase of between 50 and 100% would take care of the problem, some people would definitely have to cut back, but they would still be able to afford it if they really needed a chocolate fix.