It wasn't Enron that caused the electricity shortage in California, it was ignorant legislators, or perhaps it was ignorant constituents they worked for, who deregulated wholesale prices but not retail prices, compounded by Luddite greenies killing every proposal to build the new plants required to meet rising demand. People wanted to produce more electricity, but weren't allowed to. More demand for the same amount of the commodity meant higher prices for the producers, but the frozen consumer prices meant distributers were forced to sell for less than they were paying. That business model doesn't work for very long. And then consumers, the people who caused the problem, blame it on the victims (the distributers) of their (the consumers) greed.
Look at what happened in Texas for contrast. Here, prices were truly deregulated, at all levels. As demand went up, prices went up, prompting more investment in new natural-gas powered plants, more investment wind- and water-powered production (yes, really), and more investers entering the field. Supply kept up with demand, and now, despite the rise in gas prices, Texans now pay less for deregulated electricity than we did when prices were controlled. And guess where your fall-guy, Enron, was during all this? Hint: it starts with H- and ends with -ouston.