Bad web pages are fragile, cranky, and impossible to maintain

Bad web pages are fragile, cranky, and impossible to maintain: If you look at the source and there seems to be ten times as much markup as there is content, you're in trouble. If you see HTML tags that are completely indecipherable, you're in more trouble. If you can't tell what all that ten tons of elephant dung in your web page does, you're in biiiiiig trouble. Fire up your web page editor and try to edit the web page you last worked on six months ago, or try to edit it with a different web page editor: oops! Microsoft (etc.) just released a new browser. Oh noooooo!