I'm not a stickler for perfection either (I've ended sentences improperly before. ;) ), but, there are times when improper usage indicates something other than effectiveness, such as with the Spanish teacher mentioned by Red Boots in post #133.
I saw that and it does not surprise me that it came from a teacher. I have a visual image of a graying child of the 60's who is still wistfully trying to figure out "where it's at".