12:38 AM on 02/29/12
It just reinforces how mean people can be, it's not just people on the Internet, it's people in general, any sort of service industry. I've worked in a customer service-related position for nearly all of my adult life and the negative things people say to you in person, over the phone, in an email, whatever. . . it's really just an expression of how frustrated and angry those people are in their own lives.
It's an old phrase that's been adapted in a few different ways, but it takes years to create something and only a minute to tear it down.