Kyle Wiens:

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 Truss’s 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.
Now, Truss and I disagree on what it means to have “zero tolerance.” She thinks that people who mix up their itses “deserve to be struck by lightning, hacked up on the spot and buried in an unmarked grave,” while I just think they deserve to be passed over for a job — even if they are otherwise qualified for the position.