Yeah, I hate it too, but E stated very eloquently why "correctness" is really just a socially constructed thing -- not some independent reality. Of course, I get into big fights with my editor friends on this one. Especially when I point out that, even when we talk about standard written English for publishing purposes, the rules for what is "correct" do change over time. They hate that, too. I once told my students that comma splices might not be considered an error in 50 years, and their heads practically exploded. Sometimes I need to just keep my mouth shut!