Here's one of my favorite examples of epic failure from trusting SpellCheck.
I worked at Zoo Atlanta a few years back. In my second year there the zoo updated the employee handbook to include an underwear policy. Yes, an underwear policy. It seems that some of the female keepers and education staff were traipsing about sans brassieres and someone in Administration, on one of their very rare trips out from their offices into the zoo itself, had noticed the jiggling and taken offense (the zoo is supposed to be a "family-friendly" place, they said; I guess they never noticed the thousands of braless family-type women who paid to get in). Anyhoo...
The task of updating the handbook and issuing copies to all departments was given to the "Human Resources Assistant". A dim sort, she thought she was smarter than everyone who worked in the zoo proper because she worked in the office. After putting back the issue date for the new handbooks several times, so that the university-degreed HR Manager and Asst. Manager (also "I-work-in-an-office-and-you-don't-so-I'm-smarter-than-you" types) could read and approve the changes, they were finally issued, initially to department heads and their number twos only.
I got ahold of a copy from the walking boss of Maintenance, read the underwear policy, and laughed so hard I had to sit down. It read, in part, "...all female employees must wear a brazier while working."
I told my fellow non-office workers about it as I went about that day and pretty soon everyone in the zoo had seen it or heard about it. When word filtered out the gate and over to the Admin offices an order was issued by HR for all department heads to return their "preliminary" copies of the handbook "immediately". New copies were issued a week or so later with the error corrected.
It is a joy to see people who think they're smarter than everyone else prove otherwise themselves. Especially before a large number of people.