Personally, I choose not use it. The grammar that bugs me most is the Grocer’s Apostrophe. That’s the one that tells you “Apple’s and Pear’s” are on display. It also tells you, “Your fired.” It’s the apostrophe that gets in where it shouldn’t and gets missed out where it should appear. Why do so many people get it wrong?
Then again, am I wrong to be pedantic about the Grocer’s Apostrophe while being complacent about the Oxford Comma?