I simply find it sad. Not because all these apps were made -- there's obviously money in it, so whatever, free market and so forth. What's sad is... there's money in it.
Outside of your self-righteous indignation, of course.
I mean, okay, maybe farting was funny when I was five. But if you're old enough to own an iPhone, you should be old enough to have a slightly more refined sense of humor.
Granted, "refined" is extremely subjective and arbitrary, but you asked so there you go ;)