I was not quite sure what to make of this. "I could care less" is just a mistake, not an Americanism. Why maths are plural in the UK and not in the US is something I have always wondered about. I am unclear on why anyone would want "fortnightly" to remain a vital part of the language.
Overall, one might argue that most of these folks out to find more important things to worry about. On the other hand, I get irritated now, thanks to Duncan Thomas, when people say "observable" when they mean "observed" so perhaps I am just as bad.
Via the Agitator