Anecdotal evidence is worthless in science, there are no statistically relevant studies demonstrating your claims.
In the Congressional Record, Senate, S - 5511, May 7, l985, and part of the protest of the National Soft Drink Assn, now American Beverage, is this Statement:
"Aspartame has been demonstrated to inhibit the carbohydrate-induced synthesis of the neurotransmitter serotonin (Wurtman affidavit). Serotonin blunts the sensation of craving carbohydrates and this is part of the body's feedback system that helps limit consumption of carbohydrate to appropriate levels. Its inhibition by aspartame could lead to the anomalous result of a diet product causing increased consumption of carbohydrates."
So as far as product liability is concerned you have companies marketing an addictive excitoneurotoxic carcinogenic drug to the population as a sugarfree diet product knowing full well this is causing obesity. They also know that aspartame is addictive and that the methanol component is classified as a narcotic. Aspartame liberates free methyl alcohol causing chronic methanol poisoning. This affects the dopamine system of the brain causing the addiction.