I suppose I don't really get that kind of humor.
Getting over-sensitive about geeky details is funny. Lashing out at someone who's just trying to be nice in the process moves one into the "asshole" category, and I don't find such people particularly funny.
You realize it's just a drawing and an old woman wasn't really cussed out, right?
What's funny about the PA strip to me is Gabe's over reaction is just so, well, "geeky" maybe a "real" geek would be less vulgar and rude but it's humorous in the fantasy land of the strip and knowing Gabe.
Further, have you SEEN some of the posts here when people get uppity over details?