I won't despair anyone who decides to improve his or her life. If losing weight is something they want to do, more power to them. But when they whine because I'm eating a donut and comment loudly about "oh dear, don't even put those in front of me because I'm on a diet," I believe failure is the only thing that is going to happen in this case. If their conviction strength is so low that the mere sight of a donut or piece of cake is going to push them over the edge, give up now. You deserve a beatdown for suggesting that it's my fault your behavior is so fragile.