Although... just to play devil's advocate, you only have to look at dissensus to know that there are a load of rubes who read the news yesterday and are about to pile all of their savings into something they barely understand - perhaps there is an argument for protecting them from themselves?
I dunno if anyone will remember this, but my former colleague was trading VW and Porsche options at this time... made a LOT (tens of milions) for his company, then decisions that he blamed on them gave it all back and more... they fired him, he took them to court, but eventually gave up cos he was paying ridiculous money to lawyers who couldn't grasp the basics (EDIT: obviously that's his side of the story. But it did kinda ring true, this kangaroo court in which when he protested that he had advised against following the course they ordered him to warning it would cost 30m euros, he said "Did you want me to do what you said with the position or did you want me to make money?" and they replied "We wanted you to do both" - the kind of pigheaded stupidity that is all too believable).
Anyway, if you got mixed up in this market without understanding what you were doing you could have easily lost everything you had is my point.
Volkswagen <VOWG.DE> briefly became the world's biggest company by market value on Tuesday, as short sellers caught betting on a price drop with borrowed stock scrambled to find shares after a buying spree by Porsche <PSHG_p.DE>.
www.reuters.com