Seriously. Why do the writers always gravitate towards the stupidest characters? Dale is hardly as funny as they want us to think he is.
Case in point, the episode "Manger Babies Einstein" had a minor subplot where Dale suddenly decides to become a book writer even though he's no good at it, and it had no relevance to the main plot. So when he gives the story to Luanne and she steals it, he MURDERS the Manger Babies (expect for Gurgle). What a moron!
Dale has always been too much of a pain, and always gets away with it. He picks on Bill the most, and has victimized Hank too, like driving Hank to anger management, even though he vandalizes and trespasses on his property all the time.
The world won't really care when this show finally ends, and really, I think it's overdue. I get tired of these animated sitcoms hueing towards the worst and tiresome material, like Family Guy becoming The Stewie Griffin Show.