Good insights into voodoo problems. Slightly unsure about the sweary angle though, I love a swear up as much as the next man, but in this it feels unnecessary.
If you do not want to show it to brother, more power to you and you got my respect for thinking about what language he picks up. Really. However, the resource has exactly two impolite words in it, so it is hardly huge amount.
Maybe the author feels obliged to curse a little bit, and mostly in jest / for its own sake because the domain name includes a simulacrum of obscenity (WTF) in it.
It's just too strong for me to feel comfortable sharing it with younger ones. I guess a more accurate way to describe the issue for me would be to say it's because of the "strength" of the swearing rather than the quantity.
However, I will be sharing this with co-workers! It's a good document for reference.
Isn't this the guy whose ego is so great he crapped all over Douglas Crockford when that man so generously spent time trying to help improve Twitter Bootstrap? The very same Douglas Crockford who has contributed so much to building the JS/frontend community to what it is today.