It's worth considering that it might not be 'Enron-style' fraud, because that's the best comparison have at the moment.
What event did people compare Enron to, before Enron became 'Enron'?
It's probable we're witnessing an entirely new fraud, we just don't have all of the details yet.
Why? If there's no evidence of fraud, why are you imagining some new category of fraud that these companies have independently conjured up?
Suggesting that an entire industry is in cahoots to invent and participate in an entirely new fraud-like scheme, including companies that have lots of wealth and growth and much to lose from such an exposure...seems awfully conspiratorial, don't you think?