From Habr.

The stock exchange robot in 45 minutes caused a loss of $440 million

Someone’s answer:
is right! Captch them, Captch them. And the ban on <s>posting</s> trading more times per minute. And yes, for keyboard scripting, farming, multiplayer/virtual, multiplayer, two-computer game, etc. to write down all funds in favor of the stock exchange. It is then that these naive stock exchange children will learn what a real MMO with real dragon rules is.