*Matt, with a sleeping little robed man on his shoulder.*
Apologize, or die!
Sorry, you know I had to.
Anyway... I agree that apologies are unnecessary, but I still find them nice since they allow the reader to differentiate between who's trying their best, and someone who just doesn't care. I have little respect for people who don't care. I have great sympathy with people who're trying their best. I spent my whole life in another country speaking a different language, and after fifteen years, my written is still barely a third the quality of my oral, so I know what it's like.
For the record, when I do post grammar/spelling corrections, don't immediately assume that I wrote it with the idea of pointing and laughing at you. It's help, nothing more, nothing less.