If you take a look at your Search Terms Report, you'll realize that the likeliness is higher than you think. The Kanetix example was more on the extreme side, but it was there to make a point that bigger companies make these silly mistakes too.

You're not going to sit around for hours on end to craft the perfect ad copy - that's what A/B testing is for. However, you can (and I have) sat around for hours looking at a month's worth of keyword data. You may not agree with me (which is completely fine), but like I said clicks happen and that's money you could have saved.

It's simple advice, but it's something that a lot of people overlook - bringing it to everyone's attention was the purpose.