A company can screw his employee by not training them, an employee can also screw his company by leaving after the company trained him. Given that option, what do you think company would choose?

Just remove the "internet" factor all together, internet is just the tool used for being a bully, and the problem here is bullying resulting to suicide, with or without the use of internet. So far I havent heard a law from any country that will punish these bullies. Its just that the internet makes bullying pretty much easier.