If you think an apostrophe was one of the 12 disciples of Jesus, you will never work for me. If you think a semicolon is a regular colon with an identity crisis, I will not hire you. If you scatter commas into a sentence with all the discrimination of a shotgun, you might make it to the foyer before we politely escort you from the building.
Some might call my approach to grammar extreme, but I prefer Lynne Trusss more cuddly phraseology: I am a grammar stickler. And, like Truss author of Eats, Shoots & Leaves I have a zero tolerance approach to grammar mistakes that make people look stupid.