There was a thread about nytimes.com getting hacked [1], where it was discovered what appeared to be malware on the site to which the NYTimes.com site was redirected. By linking to a hacked site, you expose everyone to possible malware or other targeted attacks. Sure, this could work for any popular content submitted here, but I think the threat might be higher for a hacked site.

A second example, would be where Facebook and Apple employees were likely targeted and hacked by visiting iPhoneDevSDK, where their computers were compromised by Java exploit [2]. HN attracts lots of tech folks from all over the place (apple, google, facebook, startups, etc) and would be a ripe target, similar to the iPhoneDevSDK incident.

[1] https://news.ycombinator.com/item?id=6288051

[2] http://thenextweb.com/apple/2013/02/19/facebook-apple-employ...

I would have preferred to link to an article but no-one has written one yet -- and Boxee devices have been offline all day.

EDIT: here is the screenshot: http://zpr.io/6SmC.png