On a more personal note, it feels immature -- titling a section "Oh shit what" just for the sake of irony dilutes the meaning of what they're conveying. The info would be equally effective without it, and it's just filler.
I know people just want to have fun, but why not save the swearing for personal blog posts rather than a large (and growing) open source project?
Being open source, perhaps there's a fork opportunity for 'Bootstrap without the swearing'.
It's that their usage of profanity is lame. They're trying to be cool and funny, and it's very much neither of these. If they could actually managed the be humorous with profanity, then maybe I wouldn't mind it so much but this blog post really reeks of someone who is desperately trying to be funny and yet miserably fails.
If I'm reading a webcomic or some subreddit then fine.