They made a choice. If they choose to plonk down their own money
recklessly only to lose it all, then that's their own
business.
What sickens me is when they bring down their loved ones with them.
You don't have to look to China for examples of this.... in
Singapore, an undergrad lost $700,000 from playing the stock
market.
And $300,000 of this was his father's life savings. 
I say if you want to play with money, you should only play with
your own money in amounts that you can afford to write off
easily.