Why's it Sony's responsibility though? Do our employers have to dictate to us every action and thought? Are people not ever allowed to act without the official sanction of the CEO or board of directors? If it was an individual at Sony, and Sony don't act to weedle them out, I can accept that's irresponsible. If they don't vet their staff to be confident they can act professionally, that too is irresponsible. But a company can't vouch 100% for all it's staff, to ensure they don't do anything they shouldn't. Unless they were to monitor 24/7 every single thing every employee did with their internet access (assuming this was a Sony employee), there's no way to ensure it couldn't happen (other than banning internet access, which never goes down well). If a British citizen shoots a white rhino, is that the fault of the British Government for not ensuring it's citizens don't behave themselves? How could you ever enforce that? Tag everyone and monitor everything they do, and zap them when they don't do as you want them to...
If I sexually harass someone at work, while I am the one doing it, the company is who gets sued. No one is there to watch me every single minute of the day right?
It's called common sense and values. An employee need to keep the company's best interest in mind at all times. While I may want to, I can't just go upto a girl in the office and say "that shirt makes your tits look good." Sony would be liable if the charge was slander.
Fallguy,
Sony would not need more than a public class C. All internet traffic can be routed out a single IP. All lan users would be on a private network.